Frank solutions for ICSE Class 10 Biology chapter 4 - Absorption by Roots [Latest edition]

Define the following:

Osmosis

Define the following:

Diffusion

Define the following:

Turgor pressure

Define the following:

Hypertonic solution

Answer the following question.

Define and or explain the term:

Plasmolysis

Distinguish between the following:

Filtration and diffusion    

Distinguish between the following:

Turgor pressure and osmotic pressure

Distinguish between the following:

Hypotonic and hypertonic solutions   

Distinguish between the following:

Osmosis and diffusion

Distinguish between the following:

Flaccid condition and turgid condition    

Distinguish between the following:

Plasmolysis and deplasmolysis

How is root hair adapted for the absorption of water from the soil?

 What part is played by the cell wall?

What part is played by The cytoplasm in the uptake of water into the root hair?

What would happen to the root hair of a potted plant if the soil was watered with an extremely concentrated solution of sodium chloride?

The apparatus arranged alongside signifies an important process.
(i) Name the process.
(ii) Where does this process occur in plants?
(iii) What solution is placed inside the dialysis tubing?
(iv) What happens to the level of the solution in the capillary tube?

Name the following:

The pressure with which the molecules of a substance diffuse.

Name the following:

Two solutions having same concentrations.

Name the following:

The force developing in shoot responsible for most of the absorption of water.

Name the following:

The uptake of mineral ions against concentration gradient.

Name the following:

Tissue concerned with upward conduction of water.

Name the following:

Condition of cell in which the cell contents are shrunken.

Name the following:

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

Name the following:

The process by which raisins swell up when placed in a beaker of water.

Name the following:

Movement of molecules from a region of high concentration to a region of low concentration.

The diagram given below represents a plant cell after being placed in a strong sugar solution. Guidelines 1 to 5 indicate the following:
1. Strong sugar solution
2. Cell wall
3. Protoplasm
4. Large vacuole
5. Nucleus
Study the diagram and answer the questions that follow:
(i) What is the state of the cell shown in the diagram?
(ii) Name the structure which acts as a selectively permeable membrane.
(iii) If the cell had been placed in distilled water instead of strong sugar solution which feature would not have been present?
(iv) If the cell in the diagram possessed chloroplasts where would these be present?
(v) Name any one feature of this plant cell which is not present in animal cells.

Explain why:

Raisins swell up in water.

Explain why:

We gargle with saline solution in case of throat infection.

Explain why:

Bacteria and fungi do not grow in pickles, jams, jellies and squashes.

Explain why:

The leaves of wilted lettuce, if kept in cold water, become crisp.

The figure shows a diagrammatic representation of the movement of certain substances inside the stem of a certain plant. Write five sentences on whatever you can explain about the processes or the arrangement of structures indicated in the diagram.
Note: - Each sentence must include one or more of the following four words, and each word can be used several times. Xylem, phloem, roots, leaves.

The diagram given below represents the results of an experiment conducted on two freshly taken leafy shoots of a herbaceous plant. The lower ends of the shoots dip in ordinary water.
(i) What is the aim of the experiment?
(ii) Some parts of the stem in both the shoots have been removed. Name the conducting tissue in shoot (a) and in shoot (b) that has been removed.
(iii) What are the results of this experiment?

Three plants (a), (b) and (c) were placed in beakers containing coloured water. The water in each beaker was covered with a layer of oil. The leaves were removed from plant (b), while plant (c) was exposed to strong light.
(i) In which plant, (a), (b) or (c) would the water move up the fastest?
(ii) In which plant (a), (b) or (c), would the water move up slowly?
(iii) Why was the water covered with a layer of oil?
(iv) What is being investigated by this experiment?

Choose the correct answer:

Osmosis involves diffusion of ___________

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An example of a selective permeable membrane is __________

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Plasmolysis will occur when the cell is placed in a __________

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Grapes when placed in a strong sugar solution shrink because of __________

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Cell turgidity is caused by _______________

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If a marine plant is transferred to fresh water, it bursts due to ___________

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Which one is semi-permeable?

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Swelling of wooden doors during rains is caused by ___________

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Meaning of ascent of sap is ____________

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Process of ascent of sap in plants occurs ___________

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Which tissue makes passage for ascent of sap?

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Absorption of water from soil takes place by __________

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In ascent of sap water reaches upwards ____________

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The water is translocated upwards from the roots through _____________

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Exudation or bleeding is associated with ___________

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 Wilting of plants occurs when ____________