本题目来源于试卷: Unity and Diversity A.8 Evolution and Speciation，类别为 IB生物学
[单选题]
The overall structure ohf qm/l)xnuy6u e,a.2 f the fin of a whale, in tef8/b1k,ch lr2yod my 0seo 7c2rms of bones and muscles, is similar to eo ky,2cl2r 8ydc7h/1m0 s fobthe overall structure of the limb of horses. What are these structures referred to as?
A. Ancestral structures
B. Convergent structures
C. Analogous structures
D. Homologous structures
参考答案: D
本题详细解析:
Choice D is correct because homologous structures refer y+ -d)v ptakf0to structures inherited from a common ancestor which are similar but often used for different functions.Choice A is incorrect, as ancestral structures refer to structures present in an ancestor species, not structures found in present day species. Choice B is incorrect as convergent structures are not a term used in biology. Convergent evolution, on the other hand, leads to analogous structures. Choice C is incorrect as analogous structures refer to structures used for the same function, which are significantly different when closely inspected. Analogous structures also have different evolutio ykft a+pvd0)-nary origins.
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