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Biology, 16.12.2019 11:31 bendavidhizar
Which one of the following criteria is necessary for natural selection to occur? a. individuals show no variation in fitness levels. b. individuals have the same adaptations. c. a struggle for existence is apparent. d. enough resources exist for individuals to survive and thrive.
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Which one of the following criteria is necessary for natural selection to occur? a. individuals sho...
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