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Question

Which is an example of positive feedback?

A
Seasonal growth
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B
Vessel diameter and blood pressure
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C
Allosteric inhibition of enzymes
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D
Both A and B
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Solution

The correct option is C Seasonal growth
A positive feedback mechanism is the mechanism in which the end product enhances the original stimulus. An example of positive feedback in control of population includes seasonal growth. For example, Coho salmon consuming eggs had higher energy rations than the fish who did not consumer eggs. This resulted in the positive feedback of water temperature on their integrated seasonal growth.
Thus, the correct answer is 'Seasonal growth.'

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