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In the study described in the Investigating Life feature, how did the researchers create the small...

In the study described in the Investigating Life feature, how did the researchers create the small genetic changes that led to Mimulus lewisii plants having yellow-orange flowers(instead of the pink-purple flowers found in wild-type plants) and M. cardinalis plants having dark pink flowers (instead of the red flowers found in wild-type plants)?

Selective breeding

a.Genetic drift

b.Natural selection

c. Gene flow

d. Mutation

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