Question

Tropic movements in response to the stimulus of chemicals is called:

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

Answer 1

Answer: (C)

Chemotropism

Tropic movements are produced in response to the stimulus. The growth or movement of a plant or plant part in response to a chemical stimulus is called chemotropism. For example, the growth of pollen tubes towards ovules.

Geotropism is a type of growth movement by a plant in response to gravity.

Hydrotropism is a plant's growth response in which the direction of growth is determined by the water concentration gradient. Phototropism is the growth movement by plant parts in response to the stimulus of light.

So, the correct answer is option C.