AP Biologyeasymcq1 pt
A key feature of positive feedback is that it
A.amplifies the change until an external event ends it
B.always returns the system to set point
C.never occurs in biology
D.is the same as equilibrium
Explanation
Core Concept
Positive loops drive the system further from set point — like clotting cascades — and need a reset (birth, wound sealing) to terminate.
Correct Answer
Aamplifies the change until an external event ends it
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