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MCAT Question A Day - 10/1/14 - Answer!

All of the following factors would most likely favor an r-selection reproductive strategy over a K-selection strategy EXCEPT:

A.  intense seasonal droughts
B.  short growing season
C.  limited space
D.  large scale commercial predation by humans

C is correct. r-strategy is more efficient when the prevailing conditions are governed by density independent factors such as harsh environment, short seasons, etc. Commercial predation methods have a similar effect. R-strategists are able to better withstand massive predation from man or others, because they produce so many more offspring than they need to continue the species. K-strategists fare better when the prevailing conditions are governed by density dependent factors such as limited resources. K-strategists can better exploit limited resources by specializing.

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