Question

Assertion :Bulliform cells are useful in the unrolling of leaf Reason: Bulliform leaves store water.

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

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

In isobilateral leaves, the upper epidermis contains specialized cells, i.e., uniform or motor cells. They are highly vacuolated and can store water, if available. However, in the case of water deficiency, the uniform cells lose water and become flaccid. As a result, the leaf gets rolled to reduce the exposed surface. the uniform cells are also useful in the unrolling of the leaf during its developments.

So the correct answer is 'B'.