[D] A series of observations is presented and explained in terms of the dominant theory.
3. The text supplies information for answering which of the following questions?
[A] Why are Japanese starry flounder mostly left-eyed?
[B] Why should the eye-sidedness in starry flounder be considered selectively neutral?
[C] Why have biologists recently become interested in whether a characteristic is adaptive or selectively neutral?
[D] How do the eyes in flatfish migrate?
4. Which of the following is most clearly similar to a cline as it is described in the second paragraph of the text?
[A] A vegetable market in which the various items are grouped according to place of origin.
[B] A wheat field in which different varieties of wheat are planted to yield a crop that will bring the maximum profit.
[C] A flower stall in which the various species of flowers are arranged according to their price.
[D] A housing development in which the length of the front struts supporting the porch of each house increases as houses are built up the hill.
5. Which of the following phrases from the text best expresses the authors conclusion about the meaning of the difference between left-eyed and right-eyed flatfish?
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