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Selina solutions for Class 10 Biology chapter 3 - Absorption By Roots -The Process Involved

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Chapter 3: Absorption By Roots -The Process Involved

Chapter 3: Absorption By Roots -The Process Involved solutions [Page 0]

MULTIPLE CHIOCE TYPE 

Absorption of water by the plant cells by surface attraction is called:
(a) Diffusion
(b) Osmosis
(c) Imbibition
(d) Endosmosis 

MULTIPLE CHIOCE TYPE: 

A plant cell placed in a certain solution got plasmolysed. What was the kind of solution?
(a) Isotonic sugar solution
(b) Hypotonic salt solution
(c) Hypertonic salt solution
(d) Isotonic salt solution

MULTIPLE CHIOCE TYPE: 

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.
(a) Flaccidity
(b) Turgidity
(c) Capillarity
(d) Tonicity 

MULTIPLE CHIOCE TYPE 

Which one of the following is a characteristic NOT related with the suitability of the roots for absorbing water?
(a) Tremendous surface area
(b) contain cell sap at a higher concentration than the surrounding soil water
(c) Root hairs have thin cell walls
(d) Grow downward into the soil

MULTIPLE CHIOCE TYPE:

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
(a) Osmosis
(b) Diffusion
(c) active transport
(d) Capillarity

MULTIPLE CHIOCE TYPE: 

Osmosis and diffusion are the same except that osmosis there is:
(a) a freely permeable membrane
(b) a cell wall in between
(c) a selectively permeable membrane in between
(d) an endless inflow of water into a cell

 

MULTIPLE CHIOCE TYPE: 

The highest water potential (capacity to move out higher concentrated solution) is that of
(a) Pure water
(b) 10% salt solution
(c) Honey
(d) 50% sugar solution

MULTIPLE CHIOCE TYPE: 

The space between the cell wall and plasma membrane in a plasmolysed cell is filled with.
(a) isotonic solution
(b) hypotonic solution
(c) Hypertonic solution
(d) water 

MULTIPLE CHIOCE TYPE : 

What is responsible for guttation?
(a) Osmotic pressure
(b) Root pressure
(c) suction pressure
(d) Capillarity 

MULTIPLE CHIOCE TYPE : 

The most appropriate characteristic of a semipermeable membrane is that
(a) it has minute pores
(b) it has no pores
(c) it allows the solute to pass through but not the solvent
(d) it allows a solvent to pass through freely but prevents the passage of the solute. 

Chapter 3: Absorption By Roots -The Process Involved solutions [Page 0]

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

Name the following : 

The process by which molecules distributes 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. 

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. 

Complete the following statements:  

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 blanck 

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

Chapter 3: Absorption By Roots -The Process Involved solutions [Page 0]

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 

Mention whether the following statements are true (True) or false (False) 

A plant cell placed in hypotonic solution gets Plasmolysed. 

Mention whether the following statements are true or false  

Addition of salt to pickles prevents growth of bacteria because they turn turgid. 

Mention whether the following statements are true  or false 

Cells that have lost their water content are said to be deplasmolysed. 

Mention whether the following statements are true  or false  

Xylem is the water conducting tissue in plants. 

Mention whether the following statements are true or false  

The shrinkage of protoplasm, when a cell is kept in hypotonic solution.

Mention whether the following statements are true or false 

The cell wall of the root cell is a differentially permeable membrane. 

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.

Chapter 3: Absorption By Roots -The Process Involved solutions [Page 0]

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? 

Chapter 3: Absorption By Roots -The Process Involved solutions [Page 0]

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: 

 (a) Give the term for the state of the cell it has acquired.
(b) Comment on the nature (tonicity) of the liquid surrounding the cell.

(c) Redraw in the space provided, the diagram of the cell is 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: 

 

(a) Name the process.
(b) Define the above named process.
(c) what would you observe in the experimental set-up after an hour or so?
(d) what control experiment can be set up for comparison? 

(e) 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.
(f) Name any other substance that can be used instead of parchment paper in the above experiment.
(g) 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: 

 

(a) Name the parts labelled A, B, C and D.
(b) The root hair cell is in a turgid state. Name and explain the process that caused this state.
(c) Mention one distinct difference between the parts labelled A and B.
(d) 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:
(a) Account for the firmness and increase in the size of the potato cubes placed in water.
(b) Account for the softness and decrease in size of the potato cubes which were places in sugar solution.
(c) name and define the physical process being investigated in this experiment. 

Given below is the diagrammatic representation of the transverse section of a part of a plant. Study it and answer the questions that follow: 

 

(a) Name the part of the plant that is shown
(b) Label the parts 1 to 6
(c) Write the functions of parts 3 and 5 

Study the diagram given below and answer the questions that follows: 

 

(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? 

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 

Chapter 3: Absorption By Roots -The Process Involved

Selina Selina ICSE Concise Biology Class 10

Selina ICSE Concise Biology for Class 10 - Shaalaa.com

Selina solutions for Class 10 Biology chapter 3 - Absorption By Roots -The Process Involved

Selina solutions for Class 10 Biology chapter 3 (Absorption By Roots -The Process 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 Selina ICSE Concise Biology for Class 10 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 10 Biology chapter 3 Absorption By Roots -The Process 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 Process 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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