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Selina solutions for Class 7 Biology chapter 4 - Photosynthesis and Respiration

Selina Concise Biology - Middle School for Class 7 (2018-19 Session)

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Selina Selina Concise Biology - Middle School Class 7 (2018-19 Session)

Selina Concise Biology - Middle School for Class 7 (2018-19 Session)

Chapter 4: Photosynthesis and Respiration

Chapter 4: Photosynthesis and Respiration solutions [Page 0]

Put a tick (✓ ) against the most appropriate alternative in the following statements. 

Carbohydrates are stored by plants in the form of:
(a) Vitamins
(b) Proteins
(c) Fats
(d) Glucose . 

 

 Put a tick (✓ ) against the most appropriate alternative in the following statements. 

 Stomata are present on the surface of:
(a) Leaves
(b) Roots
(c) Stem
(d) Flower petals 

Put a tick (✓ ) against the most appropriate alternative in the following statements. 

Which one of the following is an end-product of photosynthesis ?
(a) Fructose
(b) Glucose
(c) Cellulose
(d) Lactose  

Chapter 4: Photosynthesis and Respiration solutions [Page 0]

 Why do leaves generally look green ?

Which four of the following are needed for photosyn-thesis in a leaf:
(i) Carbon dioxide:
(ii) Oxygen:
(iii) Nitrates :
(iv) Water:
(v) Chlorophyll:
(vi) Soil:
(vii) Light: 

What is the source of energy for photosynthesis ? 

Which gas is taken in and which one is given out by the leaf in bright sunlight ?  

(i) Taken in :
(ii) Given out: 

 Suppose we compare the leaf with a factory, match the items in Column A with those in Column B.
ColumnA Column B 

   Left     Factory 
1 Cells in the leaf  a Raw materials 
2 Chloroplast  b Power 
3 Sunlight  c Machinery 
4 Oxygen and water  d End product 
5 Carbon dioxde and water  e By product 
6 Glucose  f Work room 

 

State whether the following statements are True or False: 

Green plants prepare their food by using two raw materials, oxygen and water. 

State whether the following statements are True or False: 

Green plants prepare their food by using two raw materials, oxygen and water. 

State whether the following statements are True or False: 

The free oxygen in the atmospheric air is the result of photosynthesis. 

State whether the following statements are True or False:  

 Photosynthesis occurs only in chlorophyll-containing parts of the plant.  

 

Write the overall chemical equations of the two kinds of respiration in plants. 

(i) Aerobic:
(ii) Anaerobic: 

Differentiate between aerobic and anaerobic respiration. 

 

Explain how photosynthesis is different from respiration.  

Do the plants respire all day and night or only during the night ? 

 

What happens to the energy liberated during respiration? 

Chapter 4: Photosynthesis and Respiration solutions [Page 0]

In order to carry out photosynthesis, what are the substances that a plant must take in ? Also mention their sources. 

What is the role of chlorophyll in photosynthesis ? 

 

Do plants need oxygen ? If so, what is its source ? 

Chapter 4: Photosynthesis and Respiration solutions [Page 0]

What is external respiration ? 

 

Write the equation showing the process of respiration. 

 

In what form is the energy released during respiration stored ? 

 

Name the two types of respiration. 

Name the organ of respiration in fishes.

What are the holes on the sides of the body of insects called ?

Chapter 4: Photosynthesis and Respiration solutions [Page 0]

Answer the following in one word.  

What is the muscular sheet below the lungs called ?

Answer the following in one word. 

Which organ is called the voice box ?  

Answer the following in one word. 

Which membrane covers the lungs ?  

Where does exchange of gases takes place ? 

What is formed when oxygen combines with haemoglobin ?

What is carbamino hemoglobin ? 

 

Chapter 4: Photosynthesis and Respiration solutions [Page 0]

Tick the most appropriate answer. 

 The products of respiration are :
a. carbon dioxide and oxygen
b. oxygen and energy
c. carbon dioxide, water and energy
d. carbon dioxide, oxygen and energy.  

Tick the most appropriate answer. 

Glucose is oxidized to produce ethyl alcohol during
a. excretion
b. aerobic respiration
c. anaerobic respiration
d. photosynthesis 

Tick the most appropriate answer. 

In insects like grasshopper, there is a well-developed system of air tubes called
a. tracheae
b. gills
c. lungs
d. alveoli 

Tick the most appropriate answer. 

Frogs breathe through the
a.moist skin
b. lungs
c.mouth cavity
d. all of these 

Tick the most appropriate answer. 

Inside the chest, the trachea divides into two branches called
a.bronchi
b. bronchioles
c.bronchus
d. alveolus 

Tick the most appropriate answer.  

In humans beings, during inhalation the diaphragm.
a.moves up
b. moves down
c. remains at its position
d.moves down moves up 

Tick the most appropriate answer.  

Exhaled air contains
a. more carbon dioxide
b.more oxygen
c.more nitrogen
d.more hydrogen 

 Tick the most appropriate answer.  

Plants have these for exchange of gases.
a.spiracles and stomata
b.lenticels and spiracles
c.lenticels and stomata 
d.buds and flowers

Chapter 4: Photosynthesis and Respiration solutions [Page 0]

Fill in the blanks.  

The two respiration of respiration are ................ and................... 

Fill in the blanks. 

Muscles of human beings switch to anaerobic...................... in the absence of oxygen.  

Fill in the blanks. 

 In ..................respiration, food is completely oxidized into carbon dioxide, water and energy. 

Fill in the blanks. 

Below the lungs is a muscular sheet called ........................ 

Fill in the blanks. 

Bronchi divide into smaller tubes called .....................

Fill in the blanks. 

In human beings, exchange of gases takes place in .................... (lungs). 

Chapter 4: Photosynthesis and Respiration solutions [Page 0]

State if the following statements are true or false. Correct the statement if it is false. 

The oxidation pf food to release energy and water is called breathing.

Anaerobic respiration takes place in our bones. 

The microscopic air sacs present in the lungs are called bronchi. 

State if the following statements are true or false. Correct the statement if it is false.  

Respiration that takes place through skin is called pulmonary respiration.  

State if the following statements are true or false. Correct the statement if it is false. 

 Stomata are present on mature roots and woody stems.  

State if the following statements are true or false. Correct the statement if it is false. 

In photosynthesis oxygen is released as a by-product 

Chapter 4: Photosynthesis and Respiration solutions [Page 0]

Match the following. 

   Column A    Column B
  (Organism)   (Oragan of Respiration)
1 Fish  a Lungs
2 human beings  b tracheae 
3 frog  c gills 
4 cockroach  d moist skin, mouth cavity and lungs 
5 bird e lungs

Chapter 4: Photosynthesis and Respiration solutions [Page 0]

Differentiate between aerobic and anaerobic respiration. 

 

Differentiate between 

External rcpiration and Internal respiration  

Differentiate between 

Photosynthesis and Respiration  

Chapter 4: Photosynthesis and Respiration solutions [Page 0]

 Define respiration. 

What is the full form of ATP ? 

What is respiratory tract ? 

Define cutaneous respiration ? 

 What is the function of pleural fluid ? 

What is the role of the diaphragm in breathing mechanism ? 

Chapter 4: Photosynthesis and Respiration solutions [Page 0]

How is the process of cellular respiration different from breathing ? 

Explain the process of Cellular Respiration.  

In human beings, what happens to oxygen after it is inhaled through the nose ? 

Show the mechanism of breathing in human beings. 

Explain the process of exchange of gases in plants. 

Chapter 4: Photosynthesis and Respiration solutions [Page 0]

 Number the following organs in the correct order to show the path taken by fresh air at the time of inhalation.
trachea, nose, bronchioles, bronchi, larynx, alveoli, pharynx, lungs

Chapter 4: Photosynthesis and Respiration

Selina Selina Concise Biology - Middle School Class 7 (2018-19 Session)

Selina Concise Biology - Middle School for Class 7 (2018-19 Session)

Selina solutions for Class 7 Biology chapter 4 - Photosynthesis and Respiration

Selina solutions for Class 7 Biology chapter 4 (Photosynthesis and Respiration) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE Selina Concise Biology - Middle School for Class 7 (2018-19 Session) solutions in a manner that help students grasp basic concepts better and faster.

Further, we at shaalaa.com are providing such solutions so that students can prepare for written exams. Selina textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 7 Biology chapter 4 Photosynthesis and Respiration are Concept of Photosynthesis - Definition and Basic Process, Factors Affecting Photosynthesis: (Light, Carbon Dioxide, Water, Chlorophyll), Significance of Photosynthesis, Setup., Experiment to Demonstrate the Photosynthesis Process., Basic Process, Word Equation of Respiration, Respiration in Plants - Aerobic and Anaerobic, Respiration and Photosynthesis in Plants, Difference in Respiration and Photosynthesis, Concept for Respiration in Animal.

Using Selina Class 7 solutions Photosynthesis and Respiration exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Selina Solutions are important questions that can be asked in the final exam. Maximum students of CISCE Class 7 prefer Selina Textbook Solutions to score more in exam.

Get the free view of chapter 4 Photosynthesis and Respiration Class 7 extra questions for Biology and can use shaalaa.com to keep it handy for your exam preparation

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