Any form of response of an organism due to an external stimulus is known as

Photosynthesis

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Excretion

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Digestion

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Respiration

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Solution

The correct option is A
Photosynthesis

Irritability is termed as the response of an organism due to an external stimulus. It is the capacity to respond to a stimulus. Living things respond to a stimulus whereas non-living things do not.

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Which of the following is not a response to an external stimulus?

Which of the following recieves an external stimulus and generates an impulse in response?

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