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Lakhmir Singh solutions Biology for Class 10 (2019 Exam) chapter 1 Life Processes

Chapters

Lakhmir Singh Solutions for Physics for Class 10 (2019 Exam)

Lakhmir Singh Biology Class 10 (2019 Exam)

Biology for Class 10 (2019 Exam)

Chapter 1 - Life Processes

Pages 23 - 30

Which is the basic requirement of living organisms for obtaining energy?

Q 1 | Page 23

Which of the following type of energy is used by living organisms to perform vital life processes? Kinetic energy, Chemical energy, Potential energy, Nuclear energy

Q 2 | Page 23

Which of the following is an autotroph?
Green plant or Man?

Q 3 | Page 23

Name two inorganic substances which are used by autotrophs to make food.

Q 4 | Page 23

What is the mode of nutrition in fungi?

Q 5 | Page 23

Name one organism each having saprophytic, parasitic and holozoic modes of nutrition.

Q 6 | Page 23

Name the process by which plants make food.

Q 7 | Page 23

In addition to carbon dioxide and water, state two other conditions necessary for the process of photosynthesis to take place.

Q 8 | Page 24

Apart from sunlight and chlorophyll, what other things are required to make food by photosynthesis?

Q 9 | Page 24

(a) Name a gas used in photosynthesis.
(b) Name a gas produced in photosynthesis.

Q 10 | Page 24

The leaves of a plant first prepare food A by photosynthesis. Food A then gets converted into food B. What are A and B?

Q 11 | Page 24

Which substance is used to remove chlorophyll from a green leaf during photosynthesis experiments?

Q 12 | Page 24

Why do we boil the leaf in alcohol when we are testing it for starch?

Q 13 | Page 24

(a) Name the pigment in leaves which absorbs sunlight energy.
(b) What is the colour of this pigment?

Q 14 | Page 24

Name the pigment which can absorb solar energy.

Q 15 | Page 24

Name the organelle of plant cells in which photosynthesis occurs.

Q 16 | Page 24

Apart from carbon dioxide and water, name four other raw materials which are needed by the plants.

Q 17 | Page 24

Where is chlorophyll mainly present in a plant?

Q 18 | Page 24

What is the name of those cells in the leaf of a plant which control the opening and closing of stomata?

Q 19 | Page 24

Name an animal whose process of obtaining food is called phagocytosis.

Q 20 | Page 24

All the animals can be divided into three groups on the basis of their eating habits. Name the three groups.

Q 21 | Page 24

What is the scientific name of the animals which is only meat eaters?

Q 22.1 | Page 24

What is the scientific name of the animals which is only plant eaters?

Q 22.2 | Page 24

What is the scientific name of the animals which is both, plant and meat eaters?

Q 22.3 | Page 24

Name the green pigment present in the leaves of a plant.

Q 23 | Page 24

Arrange the following processes involved in the nutrition in animals in the correct order (in which they take place):
Assimilation, Egestion, Ingestion, Absorption, Digestion

Q 24 | Page 24

How does Amoeba engulf the food particle?

Q 25 | Page 24

What substances enter into the food vacuole in Amoeba to break down the food?

Q 26 | Page 24

From which part of the body, undigested food is egested in Amoeba?

 
Q 27 | Page 24

Name a unicellular animal which uses cilia to move food particles into it mouth.

Q 28 | Page 24

Name the enzyme present in human saliva. What type of food material is digested by this enzyme?

Q 29 | Page 24

Which of the organs perform the functions in humans Absorption of food?

Q 30.1 | Page 24

Which of the organs perform the following functions in humans Absorption of water?

Q 30.2 | Page 24

What moves the food in the digestive organs?

Q 31 | Page 24

What is the other same of food pipe?

Q 32 | Page 24

What substance is mixed with food in the mouth during chewing by the teeth?

Q 33 | Page 24

What is the name of tiny projections on the inner surface of small intestine which help in absorbing the digested food?

 
Q 34 | Page 24

In which part of the digestive system is water absorbed?

Q 35 | Page 24

What is the name of the opening in the human body though which undigested food is thrown out?

Q 36 | Page 24

Where is digested food absorbed into blood in human body?

Q 37 | Page 24

Name the biological catalysts which bring about chemical digestion of food.

Q 38 | Page 24

Fill in the following blanks with suitable words :

All green plants are ....................

Q 39.1 | Page 24

Fill in the following blanks with suitable words :

All non-green plants and animals are ....................

Q 39.2 | Page 24

Fill in the following blanks with suitable words :

Heterotrophs depend on .................... and other .................... for food.

Q 39.3 | Page 24

Fill in the following blanks with suitable words :

Green plants use .................... and .................... to make food.

Q 39.4 | Page 24

Fill in the following blanks with suitable words :

Iodine turns blue-black on reacting with ....................

Q 39.5 | Page 24

what is chlorophyll? What part does chlorophyll play in photosynthesis?

Q 40.1 | Page 25

Which simple food is prepared first in the process of photosynthesis?

Q 40.2 | Page 25

Name the food which gets stored in plant leaves.

Q 40.3 | Page 25

What criteria do we use to decide whether something is alive?

Q 41.1 | Page 25

 What is meant by life processes? Name the basic life processes common to all living organisms which are essential for maintaining life.

Q 41.2 | Page 25

What are autotrophs? Give one example of autotrophs.

Q 42.1 | Page 25

What are the necessary conditions for autotrophic nutrition?

Q 42.2 | Page 25

What are heterotrophs? Give one example of heterotrophs.

Q 43.1 | Page 25

What are the differences between autotrophic nutrition and heterotrophic nutrition?

Q 43.2 | Page 25

Define a nutrient. Name four important nutrients present in our food.

Q 44.1 | Page 25

What are the various types of heterotrophic nutrition?

Q 44.2 | Page 25

Photosynthesis converts energy X into energy Y. What are X and Y?

Q 45.1 | Page 25

State the various steps involved in the process of photosynthesis.

Q 45.2 | Page 25

How do plants obtain food?

Q 46.1 | Page 25

Why do plants need nitrogen? How do plants obtain nitrogen?

Q 46.2 | Page 25

Define saprophytic nutrition.Give one example.

Q 47.1 | Page 25

Define parasitic nutrition.Give one example

Q 47.2 | Page 25

Define holozoic nutrition.Give one example

Q 47.3 | Page 25

Define saprophyte. Name two saprophytes.

Q 48.1 | Page 25

Define parasite. name two parasites.

Q 48.2 | Page 25

How does carbon dioxide from the air enter the leaves of a plant to be used in photosynthesis?

Q 49.1 | Page 25

How does water from the soil reach the leaves of a plant to be used in photosynthesis?

Q 49.2 | Page 25

What substances are contained in gastric juice? What are their functions?

Q 50 | Page 25

What substances are contained in pancreatic juice? What are their functions?

Q 51 | Page 25

What is the role of hydrochloric acid in our stomach?

Q 52.1 | Page 25

What is the function of enzymes in the human digestive system?

Q 52.2 | Page 25

Which part of the body secretes bile? Where is bile stored? What is the function of bile?

Q 53.1 | Page 25

What is trypsin? What is its function?

Q 53.2 | Page 25

What are the functions of liver and pancreas in the human digestive system ?

Q 54 | Page 25

Match the organisms given in column I with the processes given in column II:

  Column I   Column II
(i) Leech (a) Holozoic nutrition
(ii) Amoeba (b) Autotrophic nutrition
(iii) Mushroom (c) Parasitic nutrition
(iv) Green plant (d) Saprophytic nutrition
Q 55 | Page 25

The process in plants which converts light energy into chemical energy.

Q 56.1 | Page 25

Organisms that cannot prepare their own food.

Q 56.2 | Page 25

Organisms that can prepare their own food.

Q 56.3 | Page 25

The cell organelle where photosynthesis occurs.

Q 56.4 | Page 25

The cells which surround a stomatal pore.

Q 56.5 | Page 25

An enzyme secreted by gastric glands in stomach which acts on proteins.

Q 56.6 | Page 25

Match the terms in column I with those in column II :

  Column I   Column II
(i) Trypsin (a) Liver
(ii) Amylase (b) Gastric glands
(iii) Bile (c) Pancreas
(iv) Pepsin (d) Saliva

 

Q 57 | Page 25

What is common for Cuscuta, ticks and leeches?

Q 58.1 | Page 26

Name the substances on which the following enzymes act in the human digestive system:

(i) Trypsin

(ii) Amylase

(iii) Pepsin

(iv) Lipase

Q 58.2 | Page 26

Why does absorption of digested food occur mainly in the small intestine?

Q 58.3 | Page 26

Herbivores depend on plants for their nutrition. These plants contain complex carbohydrates like cellulose and hemicellulose that need to be broken down, whereas carnivores do not eat plants. Hence, small intestine is longer in herbivores than in carnivores.

Q 59.1 | Page 26

What will happen if mucus is not secreted by the gastric glands?

Q 59.2 | Page 26

What causes movement of food inside the alimentary canal?

Q 59.3 | Page 26

How do guard cells regulate opening and closing of stomatel pores?

Q 60.1 | Page 26

 Two similar green plants are kept separately in oxygen free containers, one in dark and the other in continuous light. Which one will live longer? Give reasons.

Q 60.2 | Page 26

What would happen if all the green plants disappear from the earth?

Q 61.1 | Page 26

If a plant is releasing carbon dioxide and taking in oxygen during the day, does it mean that there is no photosynthesis occurring? Justify your answer.

Q 61.2 | Page 26

 Leaves of a healthy potted plant were coated with vaseline. Will this plant remain healthy for long? Give reason for your answer.

Q 62.1 | Page 26

What will happen to the rate of photosynthesis on a plant under the following circumstances?

(i) cloudy day in morning but bright sunshine in the afternoon

(ii) no rainfall in the area for a considerable time.

(iii) gathering of dust on the leaves

Q 62.2 | Page 26

Explain the mechanism of photosynthesis.

Q 62.3 | Page 26

What is photosynthesis?

Q 63.1 | Page 26

Write a chemical equation to show the process of photosynthesis in plants.

Q 63.2 | Page 26

Name the raw materials required for photosynthesis. How do plants obtain these raw materials?

Q 64.1 | Page 26

What are the various conditions necessary for photosynthesis?

Q 64.2 | Page 26

Name the various factors which affect the rate of photosynthesis in plants.

Q 64.3 | Page 26

Why is nutrition necessary for an organism?

Q 65.1 | Page 26

Define nutrition. 

Q 65.1 | Page 26

What are the different modes of nutrition? Explain with one example of each mode of nutrition.

Q 65.2 | Page 26

Name the mode of nutrition in roundworm.

Q 65.3 | Page 26

Name the mode of nutrition in  Plasmodium.

Q 65.3 | Page 26

What are herbivores, carnivores and omnivores? Give two examples of each.

Q 66.1 | Page 26

Classify the following into herbivores, carnivores and omnivores:

Lion, Man, dog, Goat, Crow, Elephant, Snake, Hawk, Rabbit, Deer

Q 66.2 | Page 26

Name the five steps which occur in the process of nutrition in animals.

Q 66.3 | Page 26

Describe the process of nutrition in Amoeba. Draw labelled diagrams to show the various steps in the nutrition in Amoeba.

Q 67.1 | Page 26

What is the mode of nutrition in Amoeba known as?

Q 67.2 | Page 26

What is the process of obtaining food by Amoeba called? What does it mean?

Q 67.3 | Page 26

 Draw a labelled diagram of the human digestive system. With the help of this diagram, describe the process of digestion of food in man (humans).

Q 68.1 | Page 26

Describe one way in which the small intestine is adapted for the absorption of digested food.

Q 68.2 | Page 26

What is the special name of the contraction and expansion movement which pushes the food further in our digestive tract (or alimentary canal)?

Q 68.3 | Page 26

Describe the parts  of our tooth with the help of a labelled diagram.

Q 69.1 | Page 26

What is meant by dental caries? How are they caused?

Q 69.2 | Page 26

What is dental plaque? What harm can it do? How can the formation of plaque be prevented?

Q 69.3 | Page 26

Name the main organs of the human digestive system. Also name the associated glands.

Q 70.1 | Page 26

 How do carbohydrates, fats and proteins get digested in human beings?

Q 70.2 | Page 26

Which of the following has the longest small intestine?

(a) carnivore
(b) omnivore
(c) herbivore
(d) autotroph

Q 71 | Page 27

The process of obtaining food by Amoeba is known as:
(a) dialysis
(b) cytokinesis
(c) phagocytosis
(d) amoebiasis

Q 72 | Page 27

The organism having parasitic mode of nutrition is:
(a) Penicillium
(b) Plasmodium
(c) Paramecium
(d) Parrot

Q 73 | Page 27

One of the following organisms has a saprophytic mode of nutrition. This organism is:
(a) mushroom
(b) malarial parasite
(c) leech
(d) lice

Q 74 | Page 27

The length of small intestine in a human adult is about:
(a) 4.5 m
(b) 1.5 m
(c) 3.5 m
(d) 6.5 m

Q 75 | Page 27

The process of digestion of food in humans begins in:
(a) stomach
(b) food pipe
(c) mouth
(d) small intestine

Q 76 | Page 27

The process of digestion in humans is completed in:
(a) oesophagus
(b) small intestine
(c) stomach
(d) large intestine

Q 77 | Page 27

In human digestive system, bile is secreted by:
(a) pancreas
(b) liver
(c) kidneys
(d) stomach

Q 78 | Page 27

Two of the following organisms have a holozoic mode of nutrition. These organisms are:

(a) Paramecium and Plasmodium
(b) Plasmodium and Parakeet
(c) Parakeet and Paramecium
(d) Paramecium and Parasite

Q 79 | Page 27

The autotrophic mode of nutrition requires
(a) carbon dioxide and water.
(b) chlorophyll.
(c) sunlight.
(d) all of the above.

Q 80 | Page 27

The correct order of steps occurring in nutrition in animals is:

(a) Ingestion → Absorption → Digestion → Assimilation → Egestion
(b) Ingestion → Digestion → Assimilation → Absorption → Egestion
(c) Ingestion → Digestion → Absorption → Assimilation → Egestion
(d) Ingestion → Assimilation → Digestion → Absorption → Egestion

Q 81 | Page 27

In human digestive system, the enzymes pepsin and trypsin are secreted respectively by:

(a) pancreas and liver
(b) stomach and salivary glands
(c) pancreas and gall bladder
(d) stomach and pancreas

Q 82 | Page 27

When carrying out the starch test on a leaf, why is it important to boil the leaf in alcohol?

(a) to dissolve the waxy cuticle
(b) to make the cells more permeable to iodine solution
(c) to remove the chlorophyll
(d) to stop chemical reactions in the cells.

Q 83 | Page 27

Pancreatic juice contains enzymes which digest:

(a) proteins and carbohydrates only
(b) proteins and fats only
(c) fats and carbohydrates only
(d) proteins, fats and carbohydrates

Q 84 | Page 27

Which of the following is the correct statement regarding bile?

(a) secreted by bile duct and stores in liver
(b) secreted by gall bladder and stored in liver
(c) secreted by liver and stored in bile duct
(d) secreted by liver and stored in gall bladder

Q 85 | Page 27

Where are proteins first digested in the alimentary canal?

(a) small intestine
(b) oesophagus
(c) mouth
(d) stomach

Q 86 | Page 27

The inner lining of stomach is protected by one of the following from the harmful effect of hydrochloric acid. This is:

(a) pepsin
(b) mucus
(c) saliva
(d) bile

Q 87 | Page 27

Which part of alimentary canal receives bile from the liver?

(a) oesophagus
(b) small intestine
(c) stomach
(d) large intestine

Q 88 | Page 27

Which of the following component of our food is digested by an enzyme which is present in saliva as well as in pancreatic juice?

(a) proteins
(b) fat
(c) minerals
(d) carbohydrate

Q 89 | Page 27

If the saliva is lacking in salivary amylase, then which of the following processes taking place in the buccal cavity will be affected?

(a) proteins breaking down into amino acids
(b) starch breaking down into sugars
(c) fats breaking down into fatty acids and glycerol
(d) intestinal layer breaking down leading to ulcers

Q 90 | Page 28

Which of the following are the correct functions of two components of pancreatic juice trypsin and lipase?

(a) trypsin digests proteins and lipase carbohydrates
(b) trypsin digests emulsified fats and lipase proteins
(c) trypsin digests starch and lipase fats
(d) trypsin digests proteins and lipase emulsified fats

Q 91 | Page 27

The oxygen liberated during photosynthesis by green plants comes from:

(a) glucose
(b) water
(c) carbon dioxide
(d) chlorophyll

Q 92 | Page 28

Which of the following is an incorrect statement?

(a) energy is essential for life processes
(b) organisms grow with time
(c) movement of molecules does not take place among cells
(d) organisms must repair and maintain their body

Q 93 | Page 28

The internal energy (cellular energy) reserve in autotrophs is:

(a) proteins
(b) fatty acids
(c) glycogen
(d) starch

Q 94 | Page 28

Which of the following events does not occur in photosynthesis?

(a) conversion of light energy into chemical energy
(b) reduction of carbon dioxide to carbohydrates
(c) oxidation of carbon to carbon dioxide
(d) absorption of light energy by chlorophyll

Q 95 | Page 28

The opening and closing of the stomatal pores depends upon:

(a) oxygen
(b) water in guard cells
(c) temperature
(d) concentration of CO2 in stomata

Q 96 | Page 28

Most of the plants absorb nitrogen in one of the following forms. This is:

(a) proteins
(b) nitrates and nitrites
(c) urea
(d) atmospheric nitrogen

Q 97 | Page 28

The first enzyme to mix with food in the digestive tract is:

(a) pepsin
(b) cellulose
(c) amylase
(d) trypsin

Q 98 | Page 28

Which of the following is the correct statement?

(a) heterotrophs synthesise their own food
(b) heterotrophs utilize solar energy for photosynthesis
(c) heterotrophs do not synthesise their own food
(d) heterotrophs are capable of converting carbon dioxide and water into carbohydrates

Q 99 | Page 28

In which of the following groups of organisms the food material is broken down outside the body and then absorbed?

(a) Mushroom, Green plants, Amoeba
(b) Yeast, Mushroom, Bread mould
(c) Paramecium, Amoeba, Cuscuta
(d) Cuscuta, Lice, Tapeworm

Q 100 | Page 28

Which of the following is the correct sequence of parts as they occur in the human alimentary canal?

(a) Mouth → Stomach → Small intestine → Oesophagus → Large intestine
(b) Mouth → Oesophagus → Stomach → Large intestine → Small intestine
(c) Mouth → Stomach → Oesophagus → Small intestine → Large intestine
(d) Mouth → Oesophagus → Stomach → Small intestine → Large intestine

Q 101 | Page 28

When a person eats sugary food, then organisms A present in his mouth act on sugar to produce a substance B. The substance B first dissolves the calcium salts from the top part C of the tooth and then from its middle part D forming holes E. These holes ultimately reach the part F in the lower part of tooth which contains nerves and blood vessels. The substance B irritates the nerve endings inside the tooth causing toothache.

(a) What are (i) organisms A, and (ii) substance B?

(b) What are (i) part C, and (ii) part D, of tooth known as?

(c) By what name are the holes E in the tooth known?

(d) Name the part F of the tooth.

(e) What will happen if organisms A reach part F of the tooth known?

Q 102 | Page 28

If the teeth are not cleaned regularly, they become covered with a sticky yellowish layer W of food particles and bacteria. Since layer W covers the teeth, the alkaline liquid X secreted by glands Y inside the mouth cannot reach the teeth surface to neutralise the acid formed by the action of organisms Z on sugary food, and hence tooth decay sets in.

(a) What is W known as?

(b) What is (i) X, and (ii) Y?

(c) What are organisms Z?

(d) State one way of removing layer W from the teeth.

Q 103 | Page 29

When a person puts food in his mouth, then teeth cut it into small pieces, chew and grind it. The glands A in the mouth secrete a substance B which is mixed with the food by tongue. The substance B contains an enzyme C which starts the digestion of food in the mouth. The slightly digested food from the mouth goes down a tube D. The special type of movements E in the walls of tube D push the food into stomach for further digestion. The stomach wall secretes gastric juice containing three substance F, G and H. One of the functions of F is to kill bacteria which may enter the stomach with food. The substance G protects the inside layer of stomach from the damaging effect of substance F whereas substance H is and enzyme for digestion. The partially digested food then enters into small intestine for further digestion.

(a) What is (i) gland A (ii) substance B, and (iii) enzyme C?

(b) Name the tube D.

(c) What is the movement E known as?

(d) What are (i) F (ii) G, and (iii) H?

Q 104 | Page 29

The partially digested food coming from the stomach of a person enters a long and narrow organ A in his body. The organ A receives the secretion of two glands : liver and pancreas. Liver secretes a greenish-yellow liquid B which is normally stored in the organ C. Pancreas secretes pancreatic juice which contains three digestive enzymes D, E and F. The intestinal juice completes the process of digestion of food. The inner wall of organ A has millions of tiny finger-like projections G which help in the rapid absorption of digested food into blood stream. The undigested part of food then passes into wider tube H which absorbs most of the water from undigested food. The last part of tube H called I stores this undigested food (or waste) for some time. The undigested food is then passed out though opening J as faeces in the process known as K.

(a) Name the organ A.

(b) Name (i) liquid B, and (ii) organ C.

(c) What are the digestive enzymes D, E and F?

(d) Name the projections G present on the inner wall of organ A.

(e) Name (i) tube H (ii) part I (iii) opening J, and (iv) process K.

Q 105 | Page 29

A unicellular animal P having no fixed shape ingests a food particle by forming temporary finger-like projections Q. The food particle is engulfed with a little surrounding water to form a temporary stomach R inside it. The chemicals S from surrounding cytoplasm enter into R and break down food into small and soluble molecules by chemical reactions. The digested food is absorbed directly into cytoplasm by the process T. The undigested food is thrown out of the body by the rupture of a cell organelle U in a process called V.

(a) Name the unicellular animal P.

(b) What are (i) Q, and (ii) R?

(c) Name (i) chemical S, and (ii) process T.

(d) Name (i) organelle U, and (ii) process V.

Q 106 | Page 29

There are four organisms A, B, C and D. The organism A eats only the flesh of other animals as food. The organism B can eat grains, fruits and vegetables as well as meat and fish. The organism C can make the food itself from simple inorganic substances present in the environment by utilising sunlight energy. On the other hand, organism D eats only plants and their products as food.

(a) Which organism is (i) omnivore (ii) herbivore, and (ii) carnivore?

(b) Which organism is an autotroph?

(c) Which organism is/are heterotroph(s)?

(d) Which organism can be a producer?

(e) Which organism is/are consumer (s)?

(f) Give one example each of organisms which could be like (i) A (ii) B (iii) C, and (iv) D

Q 107 | Page 29

The organisms A, B and C can obtain their food in three different ways. Organism A derives its food from the body of another living organism which is called its D, without killing it. The organism B takes in the solid food by the process of ingestion, digests a part of this food and throws out undigested food in the process called E. The organism C obtains its food from dead and decaying plants.

(a) What is the mode of nutrition of (i) organism A (ii) organism B, and (iii) organism C?

(b) What is the organism like D called?

(c) Name the process E.

(d) Give one example each of organisms like (i) A (ii) B, and (iii) C.

(e) What is the general name of three modes of nutrition exhibited by organisms A, B and C?

Q 108 | Page 30

An organism A which cannot move from one place to another, makes a simple food B from the substances C and D available in the environment. This food is made in the presence of a green coloured substance E present in organs F in the presence of light energy in a process called G. Some of the simple food B also gets converted into a complex food H for storage purposes. The food H gives a blue-black colour with dilute iodine solution.

(a) What is (i) organism A (ii) food B, and (iii) food H?

(b) What are C and D?

(c) Name (i) green coloured substance E, and (ii) organ F.

(d) What is the process G?

Q 109 | Page 30

X is a wild animal which eats only the flesh of other animals whereas Y is a domestic animal which feeds mainly on green grass.

(a) What are animals like X known as?

(b) What are animals Y known as?

(c) Which animal, X or Y, has a longer small intestine? Why?

(d) Name one animal which is like X.

(e) Name one animal which is like Y.

Q 110 | Page 30

Pages 46 - 51

Do all cells use oxygen to produce energy?

Q 1 | Page 46

Name one substance which is produced in anaerobic respiration by an organism but not in aerobic respiration.

Q 2 | Page 46

Name one organism which can live without oxygen.

Q 3 | Page 46

In which type of respiration, aerobic or anaerobic, more energy is released?

Q 4 | Page 46

Name the substance whose build up in the muscles during vigorous physical exercise may cause cramps.

Q 5 | Page 46

Which part of roots is involved in the exchange of respiratory gases?

Q 6 | Page 46

Name the process by which plant parts like roots, stems, and leaves get oxygen required for respiration.

Q 7 | Page 47

Name the pores in a leaf through which respiratory exchange of gases takes place.

Q 8 | Page 47

Name the areas in a woody stem through which respiratory exchange of gases takes place.

Q 9 | Page 47

What is the name of the extensions of the epidermal cells of a root which help in respiration?

Q 10 | Page 47

Out of photosynthesis and respiration in plants, which process occurs:
(a) all the time?
(b) only at daytime?

Q 11 | Page 47

Name the organs of breathing in fish.

Q 12 | Page 47

Name an animal which absorbs oxygen through its moist skin.

Q 13 | Page 47

Name an animal which depends on simple diffusion of gases for breathing.

Q 14 | Page 47

Name two animals which breathe through gills.

Q 15 | Page 47

The trachea divides into tow tubes at its lower end. What is the name of these tubes?

Q 16 | Page 47

Where does the blood absorb oxygen in the human body?

Q 17 | Page 47

Name the red pigment which carries oxygen in blood.

Q 18 | Page 47

Which gases are exchanged in your lungs?

Q 19 | Page 47

Where in the lungs does gas exchange take place?

Q 20 | Page 47

What is the name of tiny air-sacs at the end of smallest bronchioles in the lungs?

Q 21 | Page 47

What is the other name of wind-pipe?

Q 22 | Page 47

What organs are attached to the two bronchi?

Q 23 | Page 47

In the lungs:

(a) what substance is taken into the body?
(b) what substance is removed from the body?

Q 24 | Page 47

State whether the following statement is true or false:

during respiration, the plants take CO2 and release O2.

Q 25.1 | Page 47

State whether the following statement is true or false:

Energy can be produced in cells without oxygen.

Q 25.2 | Page 47

State whether the following statement is true or false:

Fish and earthworm exchange gases during respiration in the same way.

Q 25.3 | Page 47

Fill in the following blanks with suitable word:

 The organs of respiration in man are the...........

Q 26.1 | Page 47

Fill in the following blanks with suitable word:

The actual exchange of gases takes place in the..........of the lungs.

Q 26.2 | Page 47

Fill in the Following Blanks with Suitable Word:

..........In the Lungs Provide a Very Large Surface Area for Gaseous Exchange.

Q 26.3 | Page 47

c

Q 26.4 | Page 47

Fill in the following blanks with suitable word:

Gills are the breathing organs in............

Q 26.5 | Page 47

Explain why, a land plant may die if its roots remain waterlogged for a long time.

Q 27 | Page 47

What are the differences between aerobic and anaerobic respiration? Name some organisms that use the anaerobic mode of respiration.

Q 28 | Page 47

Name the final product/products obtained in the anaerobic? respiration, if it takes place:

(a) in a plant (like yeast).

(b) in an animal tissue (like muscles).

 

Q 29 | Page 47

What type of respiration takes place in human muscles during vigorous physical exercise? Give reason for your answer

Q 30 | Page 47

Name the type of respiration in which the end product is:

C2H5OH and CO2

Give one example  where such a respiration can occur.

Q 31.1 | Page 47

Name the type of respiration in which the end product is:

C2H5OH and CO2

Give one example  where such a respiration can occur.

Q 31.2 | Page 47

Name the type of respiration in which the end product is:

Lactic acid

Give one example where such a respiration can occur.

Q 31.3 | Page 47

Define breathing. State the differences between breathing and respiration.

Q 32 | Page 47

What are the different ways in which glucose is oxidized to provide energy in various organisms?

Q 33 | Page 47

Explain why, when air is taken in and let out during breathing, the lungs always contain a residual volume of air.

Q 34 | Page 48

Explain why, it is dangerous to inhale air containing carbon monoxide.

Q 35 | Page 48

Describe the process of respiration in Amoeba. State whether it is anaerobic respiration or aerobic respiration.

Q 36 | Page 48

State the three common features of all the respiratory organs like skin, gills and lungs.

Q 37 | Page 48

Describe the process of respiration in fish.

Q 38 | Page 48

 What would be the consequences of a deficiency of haemoglobin in our bodies?

Q 39 | Page 48

Describe the process of respiration in the following part of a plant:

 Root

Q 40.1 | Page 48

Describe the process of respiration in the following part of a plant:

Stem

Q 40.2 | Page 48

Describe the process of respiration in the following part of a plant:

 Leaves

Q 40.3 | Page 48

 What is meant by aquatic animals and terrestrial animals?

Q 41.1 | Page 48

From where do the aquatic animals and terrestrial animals obtain oxygen for breathing and respiration?

Q 41.2 | Page 48

Why do fishes die when taken out of water?

Q 42 | Page 48

Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms?

Q 43 | Page 48

Name the energy currency in the living organisms. When and where is it produced?

Q 44 | Page 48

Explain why, plants have low energy needs as compared to animals.

Q 45 | Page 48

Explain how, it would benefit deep sea divers if humans also had gills.

Q 46 | Page 48

What is the function of the respiratory system?

Q 47.1 | Page 48

What are the major organs of respiratory system in man (or humans)?

Q 47.2 | Page 48

Draw a labelled diagram of the human respiratory system.

Q 47.3 | Page 48

Explain how, the air we breathe in gets cleaned while passing through the nasal passage.

Q 48.1 | Page 48

Why do the walls of trachea not collapse when there is less air in it?

Q 48.2 | Page 48

How are oxygen and carbon dioxide exchanged in our body during respiration?

Q 48.3 | Page 48

How are the lungs designed in human beings to maximize the area for exchange of gases?

Q 48.4 | Page 48

Give the main points of difference between respiration in plants and respiration in animals.

Q 49.1 | Page 48

Describe the exchange of gases which takes place in the leaves of a plant

(a) during daytime, and (b) at night.

Q 49.2 | Page 48

Which contains more carbon dixoide : exhaled air or inhaled air? Why?

Q 49.3 | Page 48

"Respiration is a vital function of the body". Justify this statements.

Q 50.1 | Page 48

What type of repiration takes place (i) in yeast, and (ii) in humans?

Q 50.3 | Page 48

 Why is diffusion insufficient to meet the oxygen requirements of large multicellular organisms like humans?

Q 51.1 | Page 48

What type of arrangement exists in the bodies of large animals to meet their oxygen requirements adequately?

Q 51.2 | Page 48

What advantage a terrestrial animal has over an aquatic animal with regard to obtaining oxygen for respiration?

Q 51.3 | Page 48

Which of the following is not produced during anaerobic respiration in unicellular fungus?

(a) C2H5OH
(b) H2O
(c) CO2
(d) ATP

Q 52 | Page 48

One of the following organisms can live without oxygen of air. This organism is

(a) Amoeba
(b) Yak
(c) Yeast
(d) Leech

Q 53 | Page 48

During respiration, the exchange of gases takes place in:

(a) bronchi
(b) alveoli
(c) bronchioles
(d) trachea

Q 54 | Page 48

In one of the following organisms, the gaseous exchange during respiration does not take place through cell membrane/skin. This organism is:

(a) Electric eel
(b) Leech
(c) Earthworm
(d) trachea

Q 55 | Page 48

Which of the following is correct for the process of anaerobic respiration?

  Carbon dioxide always produced A lot of energy released
(a) No Yes
(b) No No
(c) Yes No
(d) Yes Yes

 

Q 56 | Page 48

Which of the following increases in muscle cells when they are lacking in oxygen?

(a) carbon dioxide
(b) lactose
(c) lactic acid
(d) uric acid

Q 57 | Page 49

Internal respiration may be defined as:

(a) breathing in and releasing of oxygen in the tissue
(b) the oxidation of food substances to release energy
(c) the building up (synthesis) of complex substances
(d) getting rid of carbon dixode that would accumulate in the tissues.

Q 58 | Page 49

When air is blown from mouth into a test-tube containing lime water, the lime water turns milky due to the presence of:

(a) oxygen
(b) carbon dioxide
(c) nitrogen
(d) water vapour

Q 59 | Page 48

Which of the following is the correct sequence of air passage during inhalation?

(a) nostrils → larynx → pharynx → trachea → lungs
(b) nasal passage → trachea → pharynx → larynx → alveoli
(c) larynx → nostrils → pharynx → lungs
(d) nostrils → pharynx → larynx → trachea → alevoli

Q 60 | Page 49

Lack of oxygen in muscles often leads to cramps in the legs of sprinters. This is due to conversion of pyruvate to:

(a) ethanol
(b) carbon dioxide
(c) acetic acid
(d) lactic acid

Q 61 | Page 49

During the deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in:

(a) ethanol
(b) chloroplast
(c) mitochondria
(d) golgi body

Q 62 | Page 49

Which of the following statements are correct?
(i) pyruvate can be converted into ethanol and carbon dioxide by yeast
(ii) fermentation takes place in the case of aerobic bacteria
(iii) fermentation takes place in mitochondria
(iv) fermentation is a form of anaerobic respiration
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (i) and (iv)
(d) (ii) and (iii)

Q 63 | Page 49

Which of the following statements are true about respiration?
(i) during inhalation, ribs move inward and diaphragm is raised.
(ii) the gaseous exchange takes place in the alveoli.
(iii) haemoglobin has greater affinity for carbon dioxide than oxygen.
(iv) alveoli increase surface area of the exchange of gases
(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (ii) and (iv)

Q 64 | Page 49

Which of the following is known as the energy currency of the cells in biology?

(a) DTP
(b) PDP
(c) ATP
(d) DDT

Q 65 | Page 49

The two organisms which breathe only through their moist skin are:

(a) fish and frog
(b) frog and earthworm
(c) leech and earthworm
(d) fish and earthworm

Q 66 | Page 49

One of the following animals does not use tracheae as the respiratory organs. This animal is:

(a) grasshopper
(b) prawn
(c) mosquito
(d) cockroach

Q 67 | Page 49

The photosynthesis in a plant is not taking place during the day time if the plant is releasing:

(a) water vapour
(b) oxygen
(c) carbon dioxide
(d) all the above

Q 68 | Page 49

The breathing and respiration in woody stem of a plant takes place through:

(a) root hair
(b) lenticels
(c) closed stomata
(d) open stomata

Q 69 | Page 49

One of the following organism does not depend on simple diffusion of gases for breathing and respiration. This organism is:

(a) Amoeba
(b) Prawn
(c) Planaria
(d) Bryophyllum

Q 70 | Page 50

During marathon, we sometimes get painful contractions of leg muscles due to the accumulation of one of the following in leg muscles. This is:

(a) carbon dioxide
(b) alcohol
(c) lactose
(d) lactic acid

Q 71 | Page 50

In cockroaches, air enters the body through:

(a) lungs
(b) gills
(c) spiracles
(d) skin

Q 72 | Page 50

Which of the following is most likely to have a much higher breathing rate?

(a) man
(b) fish
(c) dog
(d) sparrow

Q 73 | Page 50

During the respiration of an organism A, 1 molecule of glucose produces 2 ATP molecules whereas in the respiration of another organism B, 1 molecule of glucose produces 38 ATP molecules.

(a) Which organism is undergoing aerobic respiration?
(b) Which organism is undergoing anaerobic respiration?
(c) Which type of organism, A or B, can convert glucose into alcohol?
(d) Name one organism which behaves like A.
(e) Name two organisms which behave like B.

Q 74 | Page 50

A, B and C are three living organisms. The organism A is a unicellullar fungus which can live without air. It is used in the commercial production of an organic compound P from molasses. The organism B is a unicellular animal which lives in water and feeds and moves by using pseudopodia. It breathes through an organelle Q. The organism C is a tiny animal which acts as a carrier of malarial parasite. It breathes and respires through a kind of tiny holes R and air-tubes S in its body.

(a) What are organisms (i) A (ii) B, and (iii) C?
(b) Name (i) P (ii) Q (iii) R, and (iv) S.
(c) Which organism/organisms undergo aerobic respiration?
(d) Which organism/organisms undergo anaerobic respiration?

Q 75 | Page 50

There are five animals P, Q, R, S and T. The animal P always lives in water and has gills for breathing. The animal Q can stay in water as well as on land and can breathe both, through moist skin and lungs. The animal R lives in soil and breathes only through its skin. The animal S lives on land and breathes through spiracles and tracheae. And animal T lives in water and breathes through its cell membrane.

(a) Which of the animals could be Amoeba?
(b) Which of the animals could be frog?
(c) Which animal could be fish?
(d) Which animal could be grasshopper?
(e) Which animal could be earthworm?

Q 76 | Page 50

Question 77:

Some sugar solution is taken in a test-tube and a little of substance X in powder form is added to it. The mouth of test-tube is closed with a cork and allowed to stand for sometime. On opening the cork, a characteristic smell of substance Y is obtained and a gas Z is also observed to be formed. The gas Z extinguishes a burning matchstick.

(a) What could be (i) X, (ii) Y, and (iii) Z?

(b) What is the process of converting sugar into substance Y by the action of X known as?

(c) What type of respiration is exhibited by X in the above process?

Q 77 | Page 50

Consider the following chemical reactions which take place in different organisms/tissues under various conditions:(

i) Glucose Ethanol + Carbon dioxide + Energy
(ii) GlucoseCarbon dioxide + Water + Energy
(iii) Glucose  Lactic acid + Energy

(a) Name one organism which respires according to equation (i) above.
(b) Name one organism which respires according to equation (ii) above.
(c) When and where does respiration represented by equation (iii) above take place?
(d) Which equation/equations represent aerobic respiration?
(e) Which equation/equations represent anaerobic respiration?
(f) Which of the above reactions produces the maximum amount of energy?

Q 78 | Page 50

When a person breathes in air, the air enters into his body through an organ A having

two holes B in it. The air then passes through pharynx and larynx and enters into a

tube C. The tube C divides into two smaller tubes D at its lower end. The two

smaller tubes are attached to two respiratory organs E. Each smaller tube divides

inside the organs E to form a large number of still smaller tubes called F. The

smallest tubes F have air-sacs G at their ends in which gaseous exchange takes

place in the body of the person. What are A, B, C, D, E, F and G?

 

Q 79 | Page 51

An organism X having breathing organs A lives on land. When organism X goes

under water, it cannot survive for a long time unless carrying an oxygen cylinder.

On the other hand, the organism Y having breathing organs B always lives in water

and if taken out of water, it dies after a short while. A third organism Z having

breathing organs C and D which lives on the banks of ponds, lakes and rivers can

survive on land as well as in water equally well.

(a) What could organism X be? Name the breathing organs A.

(b) What could organism Y be? Name the breathing organs B.

(c) What could organism Z be? Name the breathing organs C and D.

(d) Out of X, Y and Z, which organism is (i) amphibian, (ii) aquatic, and (iii)

errestrial?

Q 80 | Page 51

Pages 72 - 76

What is the name of tissues which transport: 

food in a plant?

Q 1.1 | Page 72

What is the name of tissues which transport:

water and minerals in a plant?

Q 1.2 | Page 72

What substance/substances are transported in plants by:

xylem vessels and tracheids?

Q 2.1 | Page 72

What substance/substances are transported in plants by:

sieve tubes (or phloem)?

Q 2.2 | Page 72

Which organ acts as a pump in the circulatory system?

Q 3 | Page 72

Veins and arteries carry blood. Which of these carry blood:

(a) away from the heart?

(b) back to the heart?

Q 4 | Page 72

Where does blood absorb oxygen?

Q 5 | Page 72

What stops blood from flowing backwards through the heart?

Q 6 | Page 72

Name largest artery

Q 7.1 | Page 72

Name largest vein, in our body.

Q 7.2 | Page 72

What gaseous waste products are excreted by plants?

Q 8 | Page 72

Where is the dirty blood in our body filtered?

Q 9 | Page 72

Name the procedure used in the working of artificial kidney.

Q 10 | Page 72

From the following terms, choose one term which includes the other four:
Plasma, Platelets, Blood, RBC, WBC

Q 11 | Page 72

What are the components of the transport system in highly organised plants?

Q 12 | Page 72

Out of xylem and phloem, which one carries materials:

(a) upwards as well as downwards?

(b) only upwards?

Q 13 | Page 72

Name two liquids which help in the transport of substances in the human body.

Q 14 | Page 73

What is the other name of main vein?

Q 15 | Page 73

Name the conducting tissue of plants which is made of sieve tubes alongwith companion cells.

Q 16 | Page 73

Name the conducting tissue in plants which is made of living cells

Q 17.1 | Page 73

Name the conducting tissue in plants which is made of dead cells.

Q 17.2 | Page 73

State the term used for the transport of food from leaves to other parts of plant.

Q 18 | Page 73

Which process in a plant is accomplished by utilising energy from ATP : transport of water and minerals or transport of food?

Q 19 | Page 73

Name the two types of transport systems in the human beings.

Q 20 | Page 73

Name a waste gas released by the plants only during the day time.

Q 21.1 | Page 73

Name a waste gas released by the plants only during the night time.

Q 21.2 | Page 73

State whether the following statement is true or false:

Some organisms store wastes in body parts.

Q 23.1 | Page 73

State whether the following statement is true or false:

 The value of systolic pressure is always lower than that of diastolic pressure.

Q 23.2 | Page 73

Name the two parts of a plant through which its gaseous waste products are released into the air.

Q 24 | Page 73

What happens to the glucose which enters the nephron tubule alongwith the filtrate?

Q 25 | Page 73

Name the two waste products of the human body which are produced in the body cells.

Q 26 | Page 73

What is the role of glomerulus in the kidney?

Q 27 | Page 73

What is the the other name of 'high blood pressure'?

Q 28 | Page 73

Fill in the following blank with suitable words:

Gums and resins are the .......... products of plants.

Q 29.1 | Page 73

Fill in the following blank with suitable word:

Bowman's capsule and tubule taken together make a..........

Q 29.2 | Page 73

Fill in the following blank with suitable word:

The organs which extract the nitrogenous wastes from the blood are ..........

Q 29.3 | Page 73

Fill in the following blank with suitable word:

The extracellular fluid which always flows from body tissues to the heart is called............

Q 29.4 | Page 73

Fill in the following blanks with suitable words:

The ............blood cells make antibodies whereas........... blood cells help in respiration.

Q 29.5 | Page 73

What is xylem tissue? Name the two kinds of cells in xylem tissue. State whether these cells are living or dead.

Q 30 | Page 73

What is phloem tissue? Phloem contains two types of cells joined side by side. Name these two types of cells. State whether these cells are living or dead.

Q 31 | Page 73

What is transpiration?

Q 32.1 | Page 73

What do you mean by 'translocation' with respect to transport in plants?

Q 32.2 | Page 73

Which plant tissue is involved in translocation : xylem or phloem?

Q 32.3 | Page 73

Draw a labelled diagram of (i) a xylem vessel, and  (ii) a sieve tube (or phloem).

Q 33.1 | Page 73

What are the differences between the transport of materials in xylem and phloem?

Q 33.2 | Page 73

Match the terms in column I with their uses in column II

Column I  Column II
(i) Heart (a) Pipes for transport in humans
(ii) Arteries and Veins (b) Clotting of blood
(iii) Xylem vessels (c) Pumping organ
(iv) RBC (d) Water transport in plants
(v) Platelets (e) Carrier of oxygen

 

 

 

Q 34 | Page 73

Define excretion. Name the excretory unit of a kidney.

Q 35 | Page 73

What job is done by the kidneys?

Q 36.1 | Page 73

What do kidneys excrete?

Q 36.2 | Page 73

What is the name of the tubes which connect the kidneys to bladder?

Q 36.3 | Page 73

What does the bladder in our body do?

Q 36.4 | Page 73

Why do some people need to use a dialysis machine? What does the machine do?

Q 37 | Page 73

What is the liquid part of the blood called? What is the function of platelets in the blood?

Q 38 | Page 73

How many types of blood vessels are there in the human body? Name them.

Q 39.1 | Page 74

Why does the heart need valves?

Q 39.2 | Page 73

A dialysis machine contains long tubes coiled in a tank containing dialysing solution Of what substance are the tubes made?

Q 40.1 | Page 74

A dialysis machine contains long tubes coiled in a tank containing dialysing solution

What does the dialysing solution contain?

Q 40.2 | Page 74

A dialysis machine contains long tubes coiled in a tank containing dialysing solution 

 Name the main waste which passes into the dialysing solution.

Q 40.3 | Page 74

State the differences between artery, vein and capillary.

Q 41 | Page 73

 What are the upper parts of the heart called?

Q 42.1 | Page 74

What are the lower parts of the heart called?

Q 42.2 | Page 73

What is the name of blood vessels which connect arteries to veins?

Q 42.3 | Page 73

Which side of the heart pumps blood into the lungs?

Q 42.4 | Page 74

Which side of the heart pumps blood into entire body (except the lungs)?

Q 42.4 | Page 74

What are the methods used by plants to get rid of their waste products?

Q 43.1 | Page 74

How are waste products excreted in Amoeba?

Q 43.2 | Page 74

 What is lymph? State two major functions of lymph.

Q 44.1 | Page 74

What is meant by saying that the blood pressure of a person is 120/80?

Q 44.2 | Page 74

What is hypertension? Why is it caused? What harm can it do?

Q 45 | Page 74

What are the various components of blood? State their functions.

Q 46 | Page 74

With which human organ system (or human systems) is vena cava associated?

Q 47.1 | Page 74

With which human organ system (or human systems) is glomerulus associated?

Q 47.2 | Page 74

With which human organ system (or human systems) is alveoli associated?

Q 47.3 | Page 74

With which human organ system (or human systems) is villi associated?

Q 47.4 | Page 74

What is meant by 'systolic pressure' and 'diastolic pressure'? What are their normal values?

Q 48 | Page 74

What is meant by 'heart beat'? What is the usual heart beat rate at rest?

Q 49.1 | Page 74

 What change occurs in heart beats if a person runs for a while? Why?

Q 49.2 | Page 74

What is blood? Why is it red?

Q 50.1 | Page 74

State the functions of blood in our body.

Q 50.2 | Page 74

Name a circulatory fluid in the human body other than blood.

Q 50.3 | Page 74

What is meant by human circulatory system? Name the organs of the circulatory system in humans.

Q 51.1 | Page 74

Draw a diagram of the human heart and label its parts.

Q 51.2 | Page 74

What is meant by the term 'single circulation'?

Q 51.3 | Page 74

What is Meant by the Term 'Double Circulation'?

Q 51.3 | Page 74

describe the working of human blood circulatory system with the help of a suitable diagram which shows all the steps involved.

Q 52 | Page 74

Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds?

Q 53.2 | Page 74

How many chambers are there in the heart of  a mammal?

Q 53.3 | Page 74

How many chambers are there in the heart of a fish?

Q 53.3 | Page 74

How many chambers are there in the heart of  an amphibian?

Q 53.3 | Page 74

Describe the circulatory system in a fish.

Q 53.4 | Page 74

What is lymphatic system? What are its function?

Q 54.1 | Page 74

What is blood pressure? What are the two factors used to express the blood pressure of a person?

Q 54.2 | Page 74

Name the main nitrogenous waste in the human blood. How is it removed from the blood?

Q 54.3 | Page 74

Name the various organs of the human excretory system.

Q 55.1 | Page 74

Draw a neat labelled diagram of the human excretory system.

Q 55.2 | Page 74

What is the function of excretory system in humans?

Q 55.3 | Page 74

Describe the mechanism of urine formation in human excretory system. Draw a labelled diagram to illustrate your answer.

Q 56.1 | Page 74

Where is urine carried through ureters?

Q 56.2 | Page 74

What is urethra?

Q 56.3 | Page 74

What is meant by dialysis? What type of patients are put on dialysis?

Q 57.1 | Page 74

Explain the principle of dialysis with the help of a labelled diagram.

Q 57.2 | Page 74

Why is transport of materials necessary in an organism (plant or animal)?

Q 58.1 | Page 74

What is the need of special tissues or organs for transport of substances in plants and animals?

Q 58.2 | Page 74

 How are water and minerals transported in plants?

Q 58.3 | Page 74

 How is food transported in plants?

Q 58.4 | Page 74

One of the following does not have a nucleus. This one is:

(a) red blood cell
(b) white blood cell
(c) guard cell
(d) epidermal cell

Q 59 | Page 75

The component of blood which makes chemicals known as antibodies is:

(a) platelets
(b) white blood cell
(c) red blood cells
(d) plasma

Q 60 | Page 75

An animal in which the oxygenation of blood does not take place in the lungs is:
(a) cow
(b) fish
(c) frog
(d) fox

Q 61 | Page 75

Which of the following carries substances upwards as well as downwards in a plant?
(a) xylem
(b) companion cells
(c) phloem
(d) tracheids

Q 62 | Page 75

One of the following is not a constituent of blood. This one is:
(a) red blood cells
(b) white blood cells
(c) sieve plates
(d) platelets

Q 63 | Page 75

If a patient is out on dialysis, he is most likely suffering from a severe ailment of the:
(a) circulatory system
(b) respiratory system
(c) excretory system
(d) digestive system

Q 64 | Page 75

Water absorption through roots can be increased by keeping the potted plants:
(a) in the shade
(b) in dim light
(c) under the fan
(d) covered with a polythene bag

Q 65 | Page 75

A blood vessel which carries blood back to the heart is:
(a) artery
(b) vein
(c) capillary
(d) platelet

Q 66 | Page 75

Blood is pumped from the heart to the entire body by the:
(a) lungs
(b) ventricles
(c) atria
(d) nerves

Q 67 | Page 75

The blood leaving the tissues becomes richer in:
(a) carbon dioxide
(b) water
(c) haemoglobin
(d) oxygen

Q 68 | Page 75

What prevents the backflow of blood inside the heart during contraction?
(a) thick muscular walls of ventricles
(b) valves
(c) thin walls of atria
(d) all of the above

Q 69 | Page 75

Which of the following is the correct path taken by urine in our body?
(a) kidney → ureter → urethra → bladder
(b) kidney → bladder → urethra → ureter
(c) kidney   → ureter → bladder → urethra
(d) bladder → kidney → ureter → urethra

Q 70 | Page 75

In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body?
(a) pisces and amphibians
(b) amphibians and reptiles
(c) amphibians only
(d) pisces only

Q 71 | Page 75

Which vein brings clean blood from the lungs into the heart?
(a) renal vein
(b) pulmonary vein
(c) vena cava
(d) hepatic vein

Q 72 | Page 75

Which blood vessel does not carry any carbon dioxide?
(a) pulmonary artery
(b) vena cava
(c) hepatic vein
(d) pulmonary vein

Q 73 | Page 75

It has been found that people living in very high mountains have many more red corpuscles in their blood than people living in plains. Which one of the following best accounts for this phenomenon?
(a) the cold climate stimulates the production of red corpuscles to keep the body warm
(b) people of high mountains breathe more quickly
(c) the low air pressure requires more red corpuscles to supply the body cells with oxygen.
(d) the low air pressure in high mountains speeds up the blood circulation so that more red corpuscles are needed

Q 74 | Page 75

The phloem tissue in plants is responsible for the transport of:
(a) water
(b) water and minerals
(c) sugar
(d) all of the above

Q 75 | Page 75

Which of the following has a three-chambered heart?
(a) pigeon
(b) lizard
(c) fish
(d) lion

Q 76 | Page 75

In which of the following are the largest amounts of nitrogen excreted from a mammalian body?
(a) breath
(b) sweat
(c) urine
(d) faeces

Q 77 | Page 76

Which one of the following has cytoplasm but no nucleus:
(a) xylem vessel
(b) sieve, which has tube
(c) tracheid
(d) companion cell

Q 78 | Page 76

The process of carrying food from the leaves to other parts of a plant is called:
(a) transpiration
(b) transportation
(c) translocation
(d) transformation

Q 79 | Page 76

Which of the following is the only conducting tissue in non-flowering plants?
(a) xylem vessels
(b) sieve tubes
(c) companion cells
(d) tracheids

Q 80 | Page 76

Which of the following helps in the upward movement of water and dissolved minerals from the roots to the leaves through the stem?
(a) transportation
(b) translocation
(c) tropic movement
(d) transpiration

Q 81 | Page 76

Which one of the following does not have valves?
(a) heart
(b) arteries
(c) capillaries
(d) veins

Q 82 | Page 76

Which of the following is accomplished in a plant by utilising the energy stored in ATP?
(a) transport of food
(b) transport of water and minerals
(c) transport of oxygen
(d) transport of water, minerals and food

Q 83 | Page 76

Coagulation of blood in a cut or wound is brought about by:
(a) plasma
(b) platelets
(c) WBC
(d) RBC

Q 84 | Page 76

The blood vessel which carries oxygenated blood from the lungs to the heart is:
(a) main artery
(b) pulmonary artery
(c) main vein
(d) pulmonary vein

Q 85 | Page 76

The instrument for measuring blood pressure is called:
(a) manometer
(b) sphygmomanometer
(c) barometer
(d) potentiometer

Q 86 | Page 76

The excretory unit in the human excretory system is called:
(a) nephron
(b) neuron
(c) nephridia
(d) kidneyon

Q 87 | Page 76

The substance which is not reabsorbed into the blood capillaries surrounding the tuble of a nephron is mainly:
(a) glucose
(b) amino acid
(c) urea
(d) water

Q 88 | Page 76

The procedure of cleaning the blood of a person by using a kidney machine is known as:
(a) ketolysis
(b) hydrolysis
(c) dialysis
(d) photolysis

Q 89 | Page 76

The excretory organs in an earthworm are:
(a) nephridia
(b) nephrons
(c) raphides
(d) ureters

Q 90 | Page 76

The cells in our blood which destroy disease-causing germs, are:
(a) platelets
(b) skin cells
(c) RBCs
(d) WBCs

Q 91 | Page 76

The wave of expansion of an artery when blood is forced into it is called:
(a) flow
(b) heart beat
(c) pulse
(d) ticking

Q 92 | Page 76

In autotrophs, water is transported through:
(a) root hair
(b) phloem
(c) stomata
(d) xylem

Q 93 | Page 76

An animal having double circulation in a three-chambered heart is:
(a) fish
(b) snake
(c) deer
(d) sparrow

Q 94 | Page 76

The transport system in plants consists of two kinds of tissues X and Y. The tissue X is made up of living cells and consists of two components A and B. The component A has tiny pores in its end walls and contains only cytoplasm but no nucleus. On the other hand, component B has cytoplasm as well as nucleus. The tissue Y is made up of dead cells and consists of two components C and D. The component C has open ends whereas component D does not have open ends. In flowering plants, either only C or both C and D transport water but D is the only water conducting tissue in non-flowering plants.
(a) What is (i) tissue X (ii) component A, and (iii) component B?
(b) What is (i) tissue Y (ii) component C, and (iii) component D?

Q 95 | Page 76

Water and dissolved minerals get into the root hair of a plant by a process called A and enter the conducting tissue B. The process C helps the water and dissolved minerals to move up through the tissue B in roots and stem, and reach the leaves of a plant. In the leaves food is made by a process D. This food is then transported to all the parts of a plant through tissue E. The process of distributing food made in the leaves to all the parts of the plants is called F.
(a) What are (i) A (ii) B (iii) C (iv) D (v) E, and (vi) F?
(b) Which tissue is made up of living cells : B or E?
(c) Which tissue, B or E, contains sieve tubes?
(d) Which tissue, B or E, contains tracheids?

Q 96 | Page 76

The liquid connective tissue A circulates in our body continuously without stopping. This tissue contains a pigment B which imparts it a colour C. The tissue A consists of four components D, E, F and G. The component D fights infection and protects us from diseases. The component E helps in the clotting of tissue A if a person gets a cut. The component F is a liquid which consists mainly of water with many substances dissolved in it and component G carries oxygen from the lungs to all the parts of the body.
(a) What is (i) tissue A (ii) pigment B, and (iii) colour C?
(b) Name (i) D (ii) E (iii) F, and (iv) G.
(c) Name one substance (other than oxygen) which is transported by tissue A in the human body.
(d) Which two components of tissue A are the cells without nucleus?
(e) Name any two organisms ( animals) which do not have liquid like A in their body.

Q 97 | Page 76

The human body has an organ A which acts as a double pump. The oxygenated blood coming from the lungs through a blood vessel B enters the upper left chamber C of the double pump. When chamber C contracts, then blood goes into lower left chamber D. The contraction of chamber D forces the blood to go into a blood vessel E which supplies oxygenated blood to all the organs of the body (except the lungs). The deoxygenated blood coming out of the body organs is taken by a blood vessel F to the right upper chamber G of pumping organ. Contraction of chamber G forces the deoxygenated blood into right lower chamber H. And finally the contraction of chamber H sends the deoxygenated blood into lungs through a blood vessel I.
(a) What is organ A?
(b) Name the blood vessel (i) B (ii) E (iii) F, and (iv) I.
(c) What are chambers (i) C, and (ii) D?
(d) What are chambers (i) G and (ii) H?

Q 98 | Page 76

A liquid X of colour Y circulates in the human body only in one direction : from body tissues to the heart. Among other things, liquid X contains germs from cells and dead cells. The liquid X is cleaned of germs and dead cells by a special type of white blood cells called Z. This cleaned liquid is then put into blood circulatory system in subclavian veins.
(a) What is (i) liquid X, and (ii) colour Y?
(b) What are Z?
(c) The liquid X is somewhat similar to a component of blood. Name this component.
(d) Why is liquid X not red?

Q 99 | Page 76

There is a pair of bean-shaped organs P in the human body towards the back, just above the waist. A waste product Q formed by the decomposition of unused proteins in the liver is brought into organ P through blood by an artery R. The numerous tiny filters S present in organ P clean the dirty blood by removing the waste product Q. The clean blood goes into circulation through a vein T. The waste substance Q, other waste salts, and excess water form a yellowish liquid U which goes from organ P into a bag-like structure V through two tubes W. This liquid is then thrown out of the body through a tube X.
(a) What is (i) organ P, and (ii) waste substance Q?
(b) Name (i) artery R, and (ii) vein T.
(c) What are tiny filters S known as?
(d) Name (i) liquid U (ii) structure V (iii) tubes W, and (iv) tube X.

Q 100 | Page 76

The organs A of a person have been damaged completely due to which too much of a poisonous waste material B has started accumulating in his blood, making it dirty. In order to save this person's life, the blood from an artery in the person's arm is made to flow into long tubes made of substance E which are kept in coiled form in a tank containing solution F. This solution contains three materials G, H and I in similar proportions to those in normal blood. As the person's blood passes through long tubes of substance E, most of the wastes present in it go into solution. The clean blood is then put back into a vein in the arm of the person for circulation.
(a) What are organs A?
(b) Name the waste substance B.
(c) What are (i) E, and (ii) F?
(d) Name G, H and I.
(e) What is the process described above known as?

Q 101 | Page 76

Lakhmir Singh Biology Class 10 (2019 Exam)

Biology for Class 10 (2019 Exam)
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