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Biology 25 Online
OpenStudy (anonymous):

Charles Darwin spent over 20 years developing his theory of natural selection.

OpenStudy (anonymous):

I don't understand...wheres the question in this??

OpenStudy (anonymous):

true or false

OpenStudy (anonymous):

it's true

OpenStudy (anonymous):

thanksss !!!!:)

OpenStudy (anonymous):

your welcome :)

OpenStudy (beccaboo333):

http://evolution.berkeley.edu/evolibrary/article/history_14 <-

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