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Question

Two different but closely related orchards have red and yellow flowers. Red flowers attract more pollinators than

do yellow. However, the stamens within the yellow orchards have a higher pollen count. These species have a recent common ancestor, but do not crossbreed.

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What prompted the gradual change in phenotypes?


a. reshuffling of the alleles of the dominant gene

b. random mutations that changed the genome of an individual

c. availability of a new ecological niche and speciation

d. reproductive success of different variants within each orchid

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