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An example of natural selection is the red color of a male cardinal. The females of the species choose mates based on the vibrant colors of the males’ feathers. If females begin using different criteria than feather color when they choose mates, what would most likely happen to the color of the male cardinals over time? increased variation in the shades of red because the selection pressure has been relieved increased variation in the shades of red because the cardinals try different ways to impress the females decreased variation in the shades of red because no form of the trait is advantageous decreased variation in the shades of red because the only reason for variation was selection pressure

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3. Decreased variation in the shades of red because no form of the trait is advantageous.

Answer:

Option D, decreased variation in the shades of red because the only reason for variation was selection pressure

Explanation:

Certain factors which make an organism with in its species selective over other which provide an added leap of survival over others.  

Here, red color of male cardinal has only purpose and this purpose is to attract females thereby making themselves a selective species over other male species.  

Now, if somehow females start selecting males on the basis of some other characteristics then it is sure that the variations in the color of male cardinals will gradually slow down and eventually will stop as selective pressure was the only cause of their variation.

Hence, option D is correct

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