Frank solutions for Biology [English] Class 10 ICSE chapter 5 - Transpiration [Latest edition]

What is transpiration?

Answer the following (only in few words);

In which form, water comes out in transpiration?

Answer the following (only in few words);

Where does transpiration take place in leaves? Give names of the various parts.

Answer the following (only in few words);

Give one important difference between transpiration and evaporation.

Answer the following (only in few words);

When does stomatal transpiration take place in plants?

From which structure cuticular transpiration occur in plants?

Answer the following (only in few words);
How does transpiration take place in night?

Answer the following (only in few words);
What is the effect of temperature on transpiration?

Answer the following (only in few words);
What is the impact of more atmospheric pressure on transpiration?

Answer the following (only in few words);
What is the relationship between transpiration water and water absorbed from the soil?

Write short note on the following:
Hydathodes

Write short note on the following:
Guttation

Explain how the rate of transpiration is affected on:
a windy day

Explain how the rate of transpiration is affected on:
a foggy day

The diagram given alongside is an apparatus used to study a particular phenomenon in plants.
(i) Name the apparatus.
(ii) What is it used for?
(iii) What is the role played by the air bubble in this experiment?
(iv) Of what use is the reservoir?

Give a reason.
What happens to the movement of the air-bubble if the apparatus shown above is kept in dark.

Give a reason.
What happens to the movement of the air-bubble if the apparatus shown above is kept in sunlight.

Give a reason.
What happens to the movement of the air-bubble if the apparatus shown above is kept in front of a fan?

Comment on the following statement:
A well-watered potted plant shows wilting of leaves on a hot sunny day.

Distinguish between the following:
Transpiration and evaporation

Differentiate between guttation and bleeding in plants.

Distinguish between the following :
Cuticular transpiration and lenticular transpiration

Distinguish between the following:
Stomata and lenticels

Litmus paper is used to demonstrate transpiration from the leaves of the green plant.

Complete the following statement by choosing the correct alternative given in the bracket:
Loss of water as droplets through leaves of an intact plant is termed ______.

The figure below represents the set-up at the start of certain experiment to demonstrate an activity of plants:
(i) What is the aim of the experiment?
(ii) Why has oil been put in each test tube?
(iii) What will be the observations in the two test-tubes after about 2-3 days?
(iv) Give reasons to explain any change observed as answered in (iii) above.
(v) Why has the test-tube b without the plant, been taken in the experiment?

Mark the most appropriate answer in the following:

If the rate of transpiration becomes more than the rate of photosynthesis, plant will ______

Mark the most appropriate answer in the following:

Transpiration pull will be maximum under which of the following conditions?

Fill in the blank with the function in the following:

Hydathodes: ______

A well watered healthy potted plant with variegated leaves was kept in darkness for about 24 hours. It was then set up as shown in the diagram and exposed to light for about 12 hours. At the end of this time, leaf x and y were tested for starch. Study the diagram and answer the questions that follow:
(i) Why was the plant initially kept in darkness for 24 hours?
(ii) What is the function of sodium hydroxide solution in the flask?
(iii) Select the correct leaf from the five available choices shown in the diagram as a, b, c, d and e. Rewrite the correct answer by filling in the appropriate letter for the questions that follow:
1. After the starch test, leaf x would look like ______.
2. After the starch test, leaf y would look like ______.
(iv) The experiment with leaf y shows that photosynthesis requires the presence of certain factors. Mention any one factor.

The apparatus shown here is Ganong's photometer designed to demonstrate unequal transpiration from the two surfaces of a dorsiventral leaf. Before keeping the leaf in between the cups, anhydrous calcium chloride (CaCl₂) contained in two small vials were weighted and placed in both the cups. The ends of the cups were weighted and with corks through which two mercury manometers were connected. After a few hours, CaCl₂ vials were taken out and weighed again.
(i) What is the purpose of keeping CaCl₂ vials inside the cup?
(ii) After a few hours, CaCl₂ vials were taken out and weighed again.
will you except any difference in weight? If so, give reasons.
(iii) What was expect the purpose of using a manometer?
(iv) What do you mean by transpiration?

The diagram alongside represents a structure found in a leaf. Study the same and answer the questions that follow:
(i) Name the parts labeled A and B.
(ii) What is the biological term for the above structure?
(iii) What is the function of the part labeled A?
(iv) Mention two structural features of A, which help in the function mentioned in (iii) above?
(v) Where is this structure likely to be found in a leaf?
(vi) The structure (fig.5.22) helps in the process of transpiration. Explain the term transpiration.
(vii) How many other cells are found surrounding this structure as seen in the diagram?

Choose the correct answer:

Which one is responsible for guttation?

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Rate of transpiration is more, when __________

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Stomata open during day time because guard cells

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The cause of wilting is more ___________

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Guttation is a mechanism of removal of water from plant by _____________

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Secretion of sap from apex of non-injured leaf is called ___________

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Transpiration is more ____________

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The rate of transpiration is determined with the following instrument ____________

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In herbaceous plants, following percentage of absorbed water comes out __________

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Transpiration rate is high, when ___________

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More water loss in plants is the cause of wilting. This can be checked by ____________

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The percentage of cuticular transpiration in plants is _____________

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Transpiration generates __________

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Transpiration rate is low ____________

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Stomata can open in night also in _______________

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Who had said that "transpiration is a necessary evil"?