Question

Loss of water as droplets from hydathodes is called ________.

• A. Transpiration
• B. Bleeding
• C. Guttation
• D. Evaporation

Answer 1

The correct option is C

Guttation

The correct option is C.

Explanation for the correct option:

1. Hydathodes are also known as open water pores
2. These are present at the margins of leaf epidermis.
3. It is the pore at which small xylem vessels of veins of leaves open.
4. When there is positive root pressure of water, the water comes out of these pores by the process called Guttation.

Explanation for the incorrect option:

Option A:

1. Transpiration is the process of loss water from the stomatal pores, lenticels and cuticle in the form of water vapour.
2. It creates negative root pressure at the top portions of the plant.

Option B:

1. Bleeding in plants occur when there is a cut in the plant body.
2. The sap content, i.e., water and sugars comes out of the cut vessels.

Option D:

1. Evaporation is the process of conversion of water in liquid form into water vapour.
2. It is the loss of water vapour from any wet surface.

Final answer: Loss of water as droplets from hydathodes is called guttation.