A change in activity in the body of an organism due to stimulus
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The simplest type of response is a direct one-to-one stimulus-response reaction. A change in the environment is the stimulus; the reaction of the organism to it is the response. In single-celled organisms, the response is the result of a property of the cell.
An adaptation is a feature that helps an organism, such as a plant or animal, survive in its environment.
A response can be defined as any change in the behaviour of a living organism that results when an external or internal stimulus is provided.
Growth is an irreversible, permanent increase in the size of an organ or its parts or even of an individual cell.
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