Question
ICSEENIBI10003486

Given below is an experimental setup to demonstrate a particular process. Study the same and answer the questions which follow:

(i) Name the physiological process being studied.

(ii) Explain the process mentioned above.

(iii)What is the aim of the above experiment?

(iv)What would you observe in the experimental setup after an hour? Give a reason to support your answer.

(v) Mention any three adaptations in plants to overcome the physiological process mentioned in (i) above. 

Solution

(i) Transpiration.
(ii) Transpiration is a process by which plants lose water in the form of water vapour,
 through the aerial parts of the plant. Transpiration helps plants to maintain their  temperature. It also cools the regions around the plants.
(iii)The aim of the experiment is to demonstrate that more transpiration occurs from
the lower surface of the leaf. 
(iv)After an hour, both the cobalt chloride papers attached to the upper as well as the
lower surface of the leaf turn pink. However, the pink colour of the paper attached
to the lower surface is darker as compared to the paper attached to the upper
surface of the leaf. This is because the number of stomata on the lower surface is
more than the number of stomata on the upper surface of the leaf.
(v) Adaptations in plants to overcome the process of transpiration:
a. Presence of a thick cuticle.
b. Reduced exposed surfaces as the leaves get wavy, rolled or folded.
c. Leaves may be shed or modified into spines.

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