science
Grade-4-
Easy
Question
Which of the statements best defines a “stimulus”.
- 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:
Stimulus causes a change that can be detected in the surroundings.
The correct answer is: Something that causes change in the environment.
The correct option is a) Something that causes change in the environment.
A stimulus is change that can be detected in the physical or chemical structure of the internal or external environment of an organism. The ability of an organism or organ to sense external stimuli and produce an appropriate response is called sensitivity.
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