Question

1. Guttation takes place when

• A. (a) air is hot
• B. (b) air is humid
• C. (c) air is hot and humid
• D. (d) hydathodes are open

Answer 1

The correct option is C

(c) air is hot and humid

The correct option is C.

Explanation for the correct answer:

1. Guttation is the process of water loss from plants in the form of water droplets.
2. This process occurs through the pores called hydathodes, found on the leaf margins.
3. This loss of water takes place in a hot and humid environment.

Explanation for incorrect options

Option A

Loss of water during hot air will lead to water imbalance in the plant body. Thus, hot and humid air is the requirement for guttation.

Option B

The roots of plants absorb water during humid conditions. Excess humid air will increase the plant's water concentration, which will not move out in the absence of hot air.

Option D

Hydathodes are small water pores on leaves. These pores are unregulated thus, they always remain open.

Guttation occurs during hot and humid air.