Question

Assertion :The water molecules are held together from root cells to the vascular bundle because of cohesive force. Reason: Water does not ascend in the plant because of transpiration pull.

• 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. Assertion is incorrect but Reason is correct.

Answer 1

The correct option is C Assertion is correct but Reason is incorrect.

According to the most widely accepted transpiration pull theory. The cohesion forces make water molecules stick to each other and adhesion forces cause water molecules to stick to the xylary elements. Both of these forces will make water rise as a column in xylary elements. The loss of water during transpiration generates the necessary pull to lift water through the xylary elements.