单选题The text supplies information for answering which of the following questions?AWhy are Japanese starry flounder mostly left-eyed?BWhy should the eye-sidedness in starry flounder be considered selectively neutral?CWhy have biologists recently become interested in whether a characteristic is adaptive or selectively neutral?DHow do the eyes in flatfish migrate?
单选题
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?
参考解析
解析：
细节题。原文第四段的首句提到 The problem with the above explanation is that the Japanese starry flounder population is almost exclusively left-eyed, and natural selection never promotes a purely less advantageous variation.，即作者认为这种解释的有问题。此外第三段的尾句和第四段的第二、三句也暗示了本题答案是B项。
细节题。原文第四段的首句提到 The problem with the above explanation is that the Japanese starry flounder population is almost exclusively left-eyed, and natural selection never promotes a purely less advantageous variation.，即作者认为这种解释的有问题。此外第三段的尾句和第四段的第二、三句也暗示了本题答案是B项。
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