What trait of the pitcher plant causes the closure of its flap when an insect sits on it?

Response to stimulus

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Random movement

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Growth related response

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Self defense mechanism

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Solution

The correct option is A
Response to stimulus

An external force which brings about a response from living organisms is called a stimulus.

The closing of the flap of a pitcher plant occurs as a response to a stimulus. The stimulus in this case is the insect. When the insect lands on the cavity of the plant, the flap closes as a response to the movement of the insect.

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