Question

Assertion :The loss of water in its liquid phase from the leaves is called guttation. Reason: Guttation takes place at night only.

• 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 C Assertion is correct but Reason is incorrect

The loss or excretion of water in the form of liquid droplets from the leaves and other parts of an uninjured or intact plant is called guttation. All plants do not show guttation. It is restricted to about $345$ genera of herbaceous and some woody plants. It takes place through special structures called hydathodes, that are usually found on the margins and tips of the leaves. Common examples are found in garden nasturtium, oat and other cereals, balsam, tomato, cucurbits. It usually occurs during periods of active growth when conditions favour more water absorption and less transpiration. Guttation takes place either at night or early in the morning.

So, the correct answer is 'Assertion is correct but Reason is incorrect'.