The picture below shows a mother swallow and her chicks.
Each of these baby chicks is sli...
The picture below shows a mother swallow and her chicks.
Each of these baby chicks is slightly different from the others because of variations in the chicks' A. ability to evolve B. environment conditions C. genetic code .Natural selection will act on this group of offspring only if A. the chicks variations result in different reproductive success B. the chicks change their adaptions based on their environment C. the environment changes rapidly during the chicks lifespan
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