Question

The growth movements of plants in response to the force of gravity is called:

• A. Hydrotropism
• B. Geotropism
• C. Chemotropism
• D. Phototropism

Answer 1

The correct option is B Geotropism

Hydrotropism is the growth movement of plants in response to water gradient. (e.g. growth movement of roots in the soil in search for water.

Geotropism is growth movement by a plant in response to gravity (e.g. most of the roots grow downwards).

Chemotropism is the growth movement of plants, in response to a chemical substance. (e.g. movement of pollen tubes towards ovary).

Phototropism is the growth movement of plants in response to light (e.g. movement of sunflower in the direction of light).

So, the correct answer is option B.