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Selina solutions for Concise Biology Class 10 Icse chapter 4 - Absorption by roots - The Processes Involved [Latest edition]

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Concise Biology Class 10 Icse - Shaalaa.com

Chapter 4: Absorption by roots - The Processes Involved

Multiple choice typeVery short answer typeShort answer typeLong answer typeStructured/ Application/Skill type

Multiple choice type [Page 51]

Selina solutions for Concise Biology Class 10 Icse Chapter 4 Absorption by roots - The Processes Involved Multiple choice type [Page 51]

Multiple choice type | Q 1.01 | Page 51

Absorption of water by the plant cells by surface attraction is called:

  • Diffusion

  • Osmosis

  • Imbibition

  • Endosmosis

Multiple choice type | Q 1.02 | Page 51

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

Multiple choice type | Q 1.03 | Page 51

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

Multiple choice type | Q 1.04 | Page 51

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

Multiple choice type | Q 1.05 | Page 51

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

Multiple choice type | Q 1.06 | Page 51

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

Multiple choice type | Q 1.07 | Page 51

The highest water potential (capacity to move out higher concentrated solution) is that of

  • Pure water

  • 10% salt solution

  • Honey

  • 50% sugar solution

Multiple choice type | Q 1.08 | Page 51

The space between the cell wall and plasma membrane in a plasmolysed cell is filled with.

  • isotonic solution

  • hypotonic solution

  • hypertonic solution

  • water

Multiple choice type | Q 1.09 | Page 51

What is responsible for guttation?

  • Osmotic pressure

  • Root pressure

  • Suction pressure

  • Capillarity

Multiple choice type | Q 1.1 | Page 51

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

Very short answer type [Pages 51 - 52]

Selina solutions for Concise Biology Class 10 Icse Chapter 4 Absorption by roots - The Processes Involved Very short answer type [Pages 51 - 52]

Very short answer type | Q 1.1 | Page 51

Name the following: 

The condition of a cell placed in a hypotonic solution. 

Very short answer type | Q 1.2 | Page 51

Name the following: 

The process by which intact plants lose water in the form of droplets from leaf margins

Very short answer type | Q 1.3 | Page 51

Name the following : 

The process by which water enters root hairs. 

 

Very short answer type | Q 1.4 | Page 51

Name the following: 

The tissue concerned with upward conduction of water in plants.

Very short answer type | Q 1.5 | Page 51

Name the following : 

The term for the inward movement of solvent molecules through the plasma membrane of a cell.

Very short answer type | Q 1.6 | Page 51

Name the following: 

The process by which molecules distribute themselves evenly within the space they occupy.

Very short answer type | Q 1.7 | Page 51

Name the following: 

The pressure which is responsible for the movement of water molecules across the cortical cells of the root. 

Very short answer type | Q 2.1 | Page 52

Give the equivalent terms for the following: 

Pressure of the cell contents on the cell wall 

Very short answer type | Q 2.2 | Page 52

Give the equivalent terms for the following : 

The condition in which the cell contents are shrunken 

Very short answer type | Q 2.3 | Page 52

Give the equivalent terms for the following:

Loss of water through a cut stem 

Very short answer type | Q 3.1 | Page 52

Complete the following statements: 

Hypotonic solution is one in which the solution kept outside the cell has lower solute concentration than ……………… the cell. 

Very short answer type | Q 3.2 | Page 52

Complete the following statements:  

Active transport is one in which the ions outside the roots are …………… 

Very short answer type | Q 3.3 | Page 52

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…………

Very short answer type | Q 4.1 | Page 52

fill in the blank 

When placed in a more concentrated solution, the cell contents will…………

  • shrink

  • swell up

Very short answer type | Q 4.2 | Page 52

fil in the blank 

The pressure by which the …………. Molecules tend to cross the semi-permeable membrane is called osmotic pressure. 

  • salt

  • water

Very short answer type | Q 4.3 | Page 52

fill in the blank 

Active transport is in a direction ………….. to that of diffusion.

  • opposite

  • same

Very short answer type | Q 5 | Page 52

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

Short answer type [Page 52]

Selina solutions for Concise Biology Class 10 Icse Chapter 4 Absorption by roots - The Processes Involved Short answer type [Page 52]

Short answer type | Q 1.1 | Page 52

Differentiate between the following: 

Plasmolysis and deplasmolysis 

Short answer type | Q 1.2 | Page 52

Differentiate between the following
Turgor pressure and wall pressure 

Short answer type | Q 1.3 | Page 52

Differentiate between the following: 

Guttation and bleeding

Short answer type | Q 1.4 | Page 52

Differentiate between the following : 

Turgidity and Flaccidity 

Short answer type | Q 2.1 | Page 52

(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

Short answer type | Q 2.2 | Page 52

(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

Short answer type | Q 2.3 | Page 52

(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

Short answer type | Q 2.4 | Page 52

(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

Short answer type | Q 2.5 | Page 52

(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

Short answer type | Q 2.6 | Page 52

(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

Short answer type | Q 3 | Page 52

What is the difference between ‘flaccid’ and ‘turgid’? Give one example of flaccid condition in plants. 

 

Short answer type | Q 4.1 | Page 52

Give reasons for the following: 

If you sprinkle some common salt on grass growing on a lawn, it is killed at that spot. 

Short answer type | Q 4.2 | Page 52

Give reasons for the following: 

If you uproot a plant from the soil, its leaves soon wilt. 

Short answer type | Q 4.3 | Page 52

Give reasons for the following

It is better to transplant seedlings in a flower-bed in the evening and not in the morning. 

Short answer type | Q 4.4 | Page 52

Give reasons for the following: 

A plant cell when kept in a hypertonic salt solution for about 30 minutes turns flaccid. 

Short answer type | Q 4.5 | Page 52

Give reasons for the following: 

Potato cubes when placed in water become firm and increase in size.

Short answer type | Q 5.1 | Page 52

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

Short answer type | Q 5.2 | Page 52

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

Short answer type | Q 5.3 | Page 52

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

Short answer type | Q 5.4 | Page 52

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

Short answer type | Q 5.5 | Page 52

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

Short answer type | Q 5.6 | Page 52

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

Long answer type [Page 52]

Selina solutions for Concise Biology Class 10 Icse Chapter 4 Absorption by roots - The Processes Involved Long answer type [Page 52]

Long answer type | Q 1 | Page 52

Give two examples of turgor movements in plants. 

Long answer type | Q 2 | Page 52

Explain the mechanism of closing and opening of the stomata. 

Long answer type | Q 3 | Page 52

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?

Long answer type | Q 4 | Page 52

Explain how soaked seeds swell up and burst their seed coats. 

Long answer type | Q 5 | Page 52

Leaves of the sensitive plant wilt and droop down on a slight touch. What mechanism brings about this change?

Long answer type | Q 6 | Page 52

What is transpiration pull? How is it caused? 

Structured/ Application/Skill type [Pages 53 - 54]

Selina solutions for Concise Biology Class 10 Icse Chapter 4 Absorption by roots - The Processes Involved Structured/ Application/Skill type [Pages 53 - 54]

Structured/ Application/Skill type | Q 1 | Page 53

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. 

Structured/ Application/Skill type | Q 2.1 | Page 53

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.

Structured/ Application/Skill type | Q 2.2 | Page 53

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.

Structured/ Application/Skill type | Q 2.3 | Page 53

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.

Structured/ Application/Skill type | Q 3.1 | Page 53

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.

Structured/ Application/Skill type | Q 3.2 | Page 53

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.

Structured/ Application/Skill type | Q 3.3 | Page 53

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?

Structured/ Application/Skill type | Q 3.4 | Page 53

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? 

Structured/ Application/Skill type | Q 3.5 | Page 53

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.

Structured/ Application/Skill type | Q 3.6 | Page 53

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.

Structured/ Application/Skill type | Q 3.7 | Page 53

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.

Structured/ Application/Skill type | Q 4.1 | Page 53

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.

Structured/ Application/Skill type | Q 4.2 | Page 53

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.

Structured/ Application/Skill type | Q 4.3 | Page 53

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.

Structured/ Application/Skill type | Q 4.4 | Page 53

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.

Structured/ Application/Skill type | Q 5.1 | Page 53

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.

Structured/ Application/Skill type | Q 5.2 | Page 53

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.

Structured/ Application/Skill type | Q 5.3 | Page 53

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.

Structured/ Application/Skill type | Q 6 | Page 54

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

Structured/ Application/Skill type | Q 7.1 | Page 54

Show by a series of diagrams, the change which a plant cell will undergo when placed in
Hypertonic salt solution

Structured/ Application/Skill type | Q 7.2 | Page 54

Show by a series of diagrams, the change which a plant cell will undergo when placed in 

Hypotonic salt solution 

Structured/ Application/Skill type | Q 8.1 | Page 54

Study the experimental setup in the figure and then answer the question that follow.

What phenomenon is being studied by this setup?

Structured/ Application/Skill type | Q 8.2 | Page 54

Study the experimental setup in the figure and then answer the question that follow.

Explain the phenomenon mention in question 8.1 .

Structured/ Application/Skill type | Q 8.3 | Page 54

Study the experimental setup in the figure and then answer the question that follow.

What is meant by 'semipermeable membrane'?

Structured/ Application/Skill type | Q 8.4 | Page 54

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.

Structured/ Application/Skill type | Q 9 | Page 54

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

Multiple choice typeVery short answer typeShort answer typeLong answer typeStructured/ Application/Skill type
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Concise Biology Class 10 Icse - Shaalaa.com

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 Absorption by Roots, Imbibition, Diffusion and Osmosis, Osmotic Pressure, Turgidity and Flaccidity, Plasmolysis, Deplasmolysis, Absorption of Water and Minerals, Active Transport, Passive Transport, Importance of Root Hair, Rise of Water up to the Xylem, Plant Physiology.

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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