A. tendency for organisms to over produce
B. struggle for existence
C. survival of the fittest
D. use and disuse of body parts
Correct Answer: Option A
A. tendency for organisms to over produce
A. tendency for organisms to over produce
B. struggle for existence
C. survival of the fittest
D. use and disuse of body parts
Correct Answer: Option A
A. tendency for organisms to over produce
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