science
Grade-4-
Easy
Question
Which statement best defines “tropism”
- Something that causes change in the environment.
- Process by which a plant grows in size.
- Process by which a new plant develops.
- A reaction to a change in the environment
Hint:
Tropism is caused by a stimulus.
The correct answer is: A reaction to a change in the environment
The correct option is d) A reaction to a change in the environment.
Tropism is a biological phenomenon that exhibits the growth or rotational movement of organisms (usually plants) in response to environmental stimuli. For tropism, this response depends on the direction of the stimulus. Tropisms are usually named after the stimulus involved.
When the stimulus is water, it is called hydrotropism. When the stimulus is light the tropism is phototropism.
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