Question

Growth of plant in response to external factors is called:

• A. Tropic movement
• B. Movement
• C. Secondary growth
• D. Primary growth

Answer 1

Answer: (A)

Tropic movement

Tropism is a biological phenomenon indicating growth or turning movement of a biological organism, usually a plant, in response to an environmental stimulus. Tropisms are typically associated with plants (although not necessarily restricted to them), where an organism is capable of directed physical movement (motility), movement or activity in response to a specific stimulus (directional response) or a kinesis (non-directional response).
Therefore, the correct answer is option A.