本题目来源于试卷: Continuity and Change D.10 Natural Selection，类别为 IB生物学
[单选题]
In the Indian ocean, sand coloured oysbbd .t0:l rx+bpj(t w2ters blend into rocks in the s,-vb, tx3h/kt,ojm/ yoypz w 5.hz+gi and bar and dark coloured oysters blend better into the deepest parts of the ocean.3o ixvtj-, ,+yhw,/y zm.bzp 5ho/gtk What type of selection is this an example of?
A. Directional selection
B. Stabilising selection
C. Disruptive selection
D. Artificial selection
参考答案: C
本题详细解析:
It is disruptive selection, as any intermediate varieties of oysters have been selected against. Choice C is correct. Choice A is incorrect as directional selection would mean that the population moves towards one extreme, i.e. either dark or light coloured oysters. Choice B is incorrect as stabilising selection promotes intermediate varieties and gets rid of extreme varieties. Choice D is incorrect as artificial selection is controlled by humans.
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