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Chapters
Chapter 2: Structure of chromosome, cell cycle and cell division
Chapter 3: Genetics - Some Basic Fundamentals
Chapter 4: Absorption by roots - The Processes Involved
Chapter 5: Transpiration
Chapter 6: Photosynthesis
Chapter 7: Chemical coordination in plants
Chapter 8: The circulatory system
Chapter 9: The Excretory system
Chapter 10: The nervous system
Chapter 11: Sense organ
Chapter 12: The Endocrine System
Chapter 13: The Reproductive system
Chapter 14: Human Evolution
Chapter 15: Population - The increasing numbers and rising problems
Chapter 16: Pollution - A Rising Environmental problem

Chapter 4: Absorption by roots - The Processes Involved
Selina solutions for Concise Biology Class 10 Icse Chapter 4 Absorption by roots - The Processes Involved Multiple choice type [Page 51]
Absorption of water by the plant cells by surface attraction is called:
Diffusion
Osmosis
Imbibition
Endosmosis
A plant cell placed in a certain solution got plasmolysed. What was the kind of solution?
Isotonic sugar solution
Hypotonic salt solution
Hypertonic salt solution
Isotonic salt solution
The state of a cell in which the cell wall is rigid and stretched by the increase in volume due to the absorption of water is called.
Flaccidity
Turgidity
Capillarity
Tonicity
Which one of the following is a characteristic NOT related with the suitability of the roots for absorbing water?
Tremendous surface area
Contain cell sap at higher concentration than the surrounding water
Root hairs have thin cell walls
Grow downward into the soil
Movement of molecules of a substance from the region of their higher concentration to the region of their lower concentration without the involvement a separating membrane, is called
Osmosis
Diffusion
Active transport
Capillarity
Osmosis and diffusion are the same except that osmosis there is:
a freely permeable membrane
a cell wall in between
a selectively permeable membrane in between
an endless inflow of water into a cell
The highest water potential (capacity to move out higher concentrated solution) is that of
Pure water
10% salt solution
Honey
50% sugar solution
The space between the cell wall and plasma membrane in a plasmolysed cell is filled with.
isotonic solution
hypotonic solution
hypertonic solution
water
What is responsible for guttation?
Osmotic pressure
Root pressure
Suction pressure
Capillarity
The most appropriate characteristic of a semipermeable membrane is that
it has minute pores
it has no pores
it allows the solute to pass through but not the solvent
it allows a solvent to pass through freely but prevents the passage of the solute
Selina solutions for Concise Biology Class 10 Icse Chapter 4 Absorption by roots - The Processes Involved Very short answer type [Pages 51 - 52]
Name the following:
The condition of a cell placed in a hypotonic solution.
Name the following:
The process by which intact plants lose water in the form of droplets from leaf margins
Name the following :
The process by which water enters root hairs.
Name the following:
The tissue concerned with upward conduction of water in plants.
Name the following:
The inward movement of solvent molecules through the plasma membrane of the cell.
Name the following:
The process by which molecules distribute themselves evenly within the space they occupy.
Name the following:
The pressure which is responsible for the movement of water molecules across the cortical cells of the root.
Give the equivalent terms for the following:
Pressure of the cell contents on the cell wall
Give the equivalent terms for the following :
The condition in which the cell contents are shrunken
Give the equivalent terms for the following:
Loss of water through a cut stem
Complete the following statements:
Hypotonic solution is one in which the solution kept outside the cell has lower solute concentration than ……………… the cell.
Active transport is one in which the ions outside the roots are ___________.
Complete the following statements:
The bending movements of certain flowers towards the sun and the sleep movements of certain plants at night are examples of…………
fill in the blank
When placed in a more concentrated solution, the cell contents will…………
shrink
swell up
fil in the blank
The pressure by which the …………. Molecules tend to cross the semi-permeable membrane is called osmotic pressure.
salt
water
fill in the blank
Active transport is in a direction ………….. to that of diffusion.
opposite
same
Match the items in column I with those in column II
Column I | Column II | |
a | Xylem | () semi - permeable |
b | Phloem | (2) permeable |
c | Cell membrane | (3) downward flow of sap |
d | Root pressure | (4) upward flow of water |
e | Cell wall | (5) guttation |
Selina solutions for Concise Biology Class 10 Icse Chapter 4 Absorption by roots - The Processes Involved Short answer type [Page 52]
Differentiate between the following:
Plasmolysis and deplasmolysis
Differentiate between the following
Turgor pressure and wall pressure
Differentiate between the following:
Guttation and bleeding
Differentiate between the following :
Turgidity and Flaccidity
(a) Mention whether the following statement is true (True) or false (False)
(b) Correct the false statement by altering the last word only.
A plant cell placed in hypotonic solution gets Plasmolysed.
True
False
(a) Mention whether the following statement is true or false.
(b) Correct the false statement by altering the last word only.
Addition of salt to pickles prevents growth of bacteria because they turn turgid.
True
False
(a) Mention whether the following statement is true or false
(b) Correct the false statement by altering the last word only.
Cells that have lost their water content are said to be deplasmolysed.
True
False
(a) Mention whether the following statement is true or false
(b) Correct the false statement by altering the last word only.
Xylem is the water conducting tissue in plants.
True
False
(a) Mention whether the following statement is true or false
(b) Correct the false statement by altering the last word only.
The shrinkage of protoplasm, when a cell is kept in hypotonic solution.
True
False
(a) Mention whether the following statement is true or false
(b) Correct the false statement by altering the last word only.
The cell wall of the root cell is a differentially permeable membrane.
True
False
What is the difference between ‘flaccid’ and ‘turgid’? Give one example of flaccid condition in plants.
Give reasons for the following:
If you sprinkle some common salt on grass growing on a lawn, it is killed at that spot.
Give reasons for the following:
If you uproot a plant from the soil, its leaves soon wilt.
Give reasons for the following
It is better to transplant seedlings in a flower-bed in the evening and not in the morning.
Give reasons for the following:
A plant cell when kept in a hypertonic salt solution for about 30 minutes turns flaccid.
Give reasons for the following:
Potato cubes when placed in water become firm and increase in size.
Mention whether the following statement is true (T) or false (F) and give explanation in support of your answer.
Plasmolysis is reverse of deplasmolysis.
True
False
Mention whether the following statement is true (T) or false (F) and give explanation in support of your answer.
Guttation is another name for bleeding in plants.
True
False
Mention whether the following statement is true (T) or false (F) and give an explanation in support of your answer.
Soaked seeds burst into three seed coats.
True
False
Mention whether the following statement is true (T) or false (F) and give explanation in support of your answer.
If the phloem of a twig is removed keeping the xylem intact, the leaves of a twig wilt.
True
False
Mention whether the following statement is true (T) or false (F) and give explanation in support of your answer.
Guttation in plants occurs maximum at mid-day.
True
False
Mention whether the following statement is true (T) or false (F) and give explanation in support of your answer.
Dry seeds when submerged in water swell up due to endosmosis.
True
False
Selina solutions for Concise Biology Class 10 Icse Chapter 4 Absorption by roots - The Processes Involved Long answer type [Page 52]
Give two examples of turgor movements in plants.
Explain the mechanism of closing and opening of the stomata.
Concentration of mineral nutrient elements is higher inside the root hairs than in the surrounding soil. How do roots take them in from the soil?
Explain how soaked seeds swell up and burst their seed coats.
Leaves of the sensitive plant wilt and droop down on a slight touch. What mechanism brings about this change?
What is transpiration pull? How is it caused?
Selina solutions for Concise Biology Class 10 Icse Chapter 4 Absorption by roots - The Processes Involved Structured/ Application/Skill type [Pages 53 - 54]
The following diagram represents a plant cell after being placed in a strong sugar solution.
Guidelines 1 to 5 indicate the following
(1)Cell wall, (2) Strong sugar solution, (3) Protoplasm (4) Large vacuole, (5) Nucleus
(1)What is the state of the cell shown in the cell shown in the diagram?
(2)Name the structure which acts as a selectively permeable membrane.
(3)If the cell had been placed in distilled water instead of strong sugar solution, which feature would not have been seen?
(4)Name any one feature of this plant cell which is not present in an animal cell.
A leaf cell of a water plant was placed in a liquid other than pond water. After sometime, it assumed a shape as shown below:
Give the term for the state of the cell it has acquired.
A leaf cell of a water plant was placed in a liquid other than pond water. After sometime, it assumed a shape as shown below:
Comment on the nature (tonicity) of the liquid surrounding the cell.
A leaf cell of a water plant was placed in a liquid other than pond water. After sometime, it assumed a shape as shown below:
Redraw in the space provided, the diagram of the cell if it is soon placed in ordinary water for some time.
The diagram given below represents an experimental set – up to demonstrate a certain process. Study the same and answer the questions that follow:
Name the process.
The diagram given below represents an experimental set – up to demonstrate a certain process. Study the same and answer the questions that follow:
Define the above named process.
The diagram given below represents an experimental set – up to demonstrate a certain process. Study the same and answer the questions that follow:
what would you observe in the experimental set-up after an hour or so?
The diagram given below represents an experimental set – up to demonstrate a certain process. Study the same and answer the questions that follow:
what control experiment can be set up for comparison?
The diagram given below represents an experimental set – up to demonstrate a certain process. Study the same and answer the questions that follow:
Keeping in mind the root- hair, cell and its surroundings, name the parts that correspond to
(1) concentrated sugar solution
(2) parchment paper and
(3) water in the beaker.
The diagram given below represents an experimental set – up to demonstrate a certain process. Study the same and answer the questions that follow:
Name any other substance that can be used instead of parchment paper in the above experiment.
The diagram given below represents an experimental set – up to demonstrate a certain process. Study the same and answer the questions that follow:
Mention two advantages of the process to the plants.
The diagram below represents a layer of epidermal cells showing a fully grown root hair. Study the diagram and answer the questions that follow:
Name the parts labelled A, B, C and D.
The diagram below represents a layer of epidermal cells showing a fully grown root hair. Study the diagram and answer the questions that follow:
The root hair cell is in a turgid state. Name and explain the process that caused this state.
The diagram below represents a layer of epidermal cells showing a fully grown root hair. Study the diagram and answer the questions that follow:
Mention one distinct difference between the parts labelled A and B.
The diagram below represents a layer of epidermal cells showing a fully grown root hair. Study the diagram and answer the questions that follow:
Draw a diagram of the above root hair cell as it would appear when a concentrated solution of fertilizers is added near it.
Two potato cubes each 1 cm3 in size, were placed separately in two containers (A&B), the container (A) having water and the other (B) containing concentrated sugar solution. After 24 hours when the cubes were examined, those placed in water were found to be firm and had increased slightly in size and those placed in concentrated sugar solution were found to be soft and had somewhat decreased in size. Use the above information to answer the questions that follow:
Account for the firmness and increase in the size of the potato cubes placed in water.
Two potato cubes each 1 cm3 in size, were placed separately in two containers (A and B), the container A having water and the other (B) containing concentrated sugar solution. After 24 hours when the cubes were examined, those placed in water were found to be firm and had increased slightly in size and those placed in concentrated sugar solution were found to be soft and somewhat decreased in size. Use the above information to answer the questions that follow:
Account for the softness and decrease in size of the potato cubes which were placed in sugar solution.
Two potato cubes each 1 cm3 in size, were placed separately in two containers (A and B), the container A having water and the other (B) containing concentrated sugar solution. After 24 hours when the cubes were examined, those placed in water were found to be firm and had increased slightly in size and those placed in concentrated sugar solution were found to be soft and somewhat decreased in size. Use the above information to answer the questions that follow:
Name and define the physical process being investigated in this experiment.
Study the diagram given below and answer the questions that follow :
(a) Name the process being studied in the above experiment.
(b) Explain the process mentioned in (a) above
(c) Why is oil placed over water?
(d) What do we observe with regard to the level of water when this set up is placed in (1) bright sunlight (2) humid conditions (3) windy day?
(e) Mention any three adaptations found in plants to foster the process mentioned in (a) above
Show by a series of diagrams, the change which a plant cell will undergo when placed in
Hypertonic salt solution
Show by a series of diagrams, the change which a plant cell will undergo when placed in
Hypotonic salt solution
Study the experimental setup in the figure and then answer the question that follow.
What phenomenon is being studied by this setup?
Study the experimental setup in the figure and then answer the question that follow.
Explain the phenomenon mention in question 8.1 .
Study the experimental setup in the figure and then answer the question that follow.
What is meant by 'semipermeable membrane'?
Study the experimental setup in the figure and then answer the question that follow.
What will you observe in the setup after about half an hour? Give reasons for your answer.
A candidate in order to study the process of osmosis has taken 3 potato cubes and put them in 3 different beakers containing 3 different solutions. After 24 hours, in the first beaker the potato cube increased in size, in the second beaker the potato cube decreased in size and in the third beaker there was no change in the size of the potato cube. The following diagram shows the result of the same experiment:
(i) Give the technical terms of the solutions used in beakers, 1, 2 and 3.
(ii) In beaker 3, the size of the potato cube remains the same. Explain the reason in brief.
(iii) Write the specific feature of the cell sap of root hairs which helps in absorption of water.
(iv) What is osmosis?
(v) How does a cell wall and a cell membrane differ in their permeability?
Chapter 4: Absorption by roots - The Processes Involved

Selina solutions for Concise Biology Class 10 Icse chapter 4 - Absorption by roots - The Processes Involved
Selina solutions for Concise Biology Class 10 Icse chapter 4 (Absorption by roots - The Processes Involved) 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 Concise Biology Class 10 Icse solutions in a manner that help students grasp basic concepts better and faster.
Further, we at Shaalaa.com provide 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 Concise Biology Class 10 Icse chapter 4 Absorption by roots - The Processes Involved are Plant Anatomy and Plant Physiology, Characteristics of Roots for Absorbing Water, Concept of Osmosis, Semi-permeable Membrane (Cell Membrane), Concept of Imbibition, Simple Diffusion, Osmotic Pressure, Turgidity and Flaccidity (Plasmolysis), Root Pressure, Translocation of Water (Ascent of Sap), Water and Mineral Absorption by Root, Need of Water and Minerals for Plant, Active Transport, Means of Transport in Plants.
Using Selina Class 10 solutions Absorption by roots - The Processes Involved 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 10 prefer Selina Textbook Solutions to score more in exam.
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