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BIOLOGY

JAMB 2013 - Question 14

Biology 2013 JAMB Past Questions - Question 14: The structural adaptation of desert plants for water conservation is

Choose the most appropriate option for the gap .

The structural adaptation of desert plants for water conservation is

A: spongy mesophyll

B: spiny leaves

C: prominent stomata in leaves.

D: broad leaves with numerous stomata

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Correct Answer

Explanation

Desert plants like cactus have their leaves modified into spines to reduce the number of stomata and rate of transpiration. Some desert plants eg. evergreen shrub called hakea has leaves with sunken stormata or folded leaves to conserve water. Rain forest plants have broad leaves with numerous prominent stomata to eliminate excess water. Spongy mesophyll is the lower layer of the internal structure of a leaf. It consists of irregularly arranged cells with large air spaces.