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Biology 7 Online
OpenStudy (anonymous):

Directional selection acts against: both extremes simultaneously in the variation of the trait one of the extremes in variation the average or mean value for the population none of these

OpenStudy (anonymous):

what do u think?

OpenStudy (anonymous):

none of them

OpenStudy (anonymous):

http://www.ias.ac.in/jbiosci/jun2009/275.pdf u r right

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