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Question

Assertion :Aerenchyma is present in the leaves and petioles of hydrophytes.
Reason: Aerenchyma imparts buoyancy to the hydrophytes.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Plants which remain permanently immersed in water are called hydrophytes. They may be submerged or partly submerged and show the presence of aerenchyma (large air space) in the leaves and petioles. Aerenchyma helps to transport oxygen produced during photosynthesis and permits its free diffusion to other parts, including roots located in anaerobic soils. These tissues also impart buoyancy to the plants. Presence of inflated petioles in Eichhornia (water hyacinth) keeps the plants floating on the surface of water. So, the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.


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