Choose the correct answers from the alternatives given :
In which of the following plants metabolism would be hindered if leaves are coated with vaseline on their upper surface ?

Pistia

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VaIlisneria

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Lotus

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Mango

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Solution

The correct option is C Lotus
Lotus have stomata on the upper surface of its leaves. Hence, Coating of Vaseline on its upper surface will hinder transpiration.
Mango is a terrestrial plant which has stomata in the lower surface of leaves. Hence transpiration will not be affected in mango because of coating Vaseline on the upper surface.
So, the correct answer is lotus.

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Similar questions

24

24

In an experiment, four freshly plucked leaves (A - D) of a plant, such as those of China-Rose, were treated as follows :

(A) coated with vaseline on its upper surface.

(B) coated on the lower surface.

(D) left uncoated.

All the four leaves A, B, C and D were left in a room for about 24 hours.

(i) Which leaf would become most limp ? Why ?

(ii) Which leaf would show least limping ? Why ?

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