What term describes any alteration in an organism's surroundings?

Biology Mcqs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Biology Mcqsbiology-mcqs
Published
23 May 2018
Last updated
28 May 2026

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Explanation

A stimulus refers to any change or signal in the environment that can influence an organism. Variation denotes differences within a species, response is how an organism reacts to stimuli, and reaction is a broader term that may or may not be related to environmental changes.

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