Question

The movement or growth of any part of a plant in response to an external stimulus is called tropism or tropic movement.

• A. True
• B. False

Answer 1

The correct option is A True

The movement or growth of any part of a plant in response to an external stimulus is called tropism or tropic movement. For example, the growth of a shoot towards the direction of light (light acts as a stimulus) is referred to as phototropism. Similarly, the growth of the root vertically downwards into the soil (force of gravity is the stimulus) is termed geotropism.

So the statement is 'True'.