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]
What is adaptive radiatiov:.kg 4r )pjmzoxl,+k o5ma;h/kk qq j*3trkidz.01un?
A. When a new species is produced through natural selection
B. When new ecological niches are exploited, resulting in speciation
C. When a species moves to a new location and adapts to new conditions
D. When speciation occurs, and analogous traits remain
参考答案: B
本题详细解析:
Choice B is correct because adaptive radiation refers to the rapid diversification and speciation of a single ancestral species into multiple descendent species, taking advantage of different niches within a community. Choice A is incorrect as natural selection refers to organisms with advantageous traits having a greater chance of survival and so a greater chance to reproduce and pass on those traits to future generations within that population, leading to the evolution of species over time. Choice C is incorrect as it refers to the phenomenon where an organism changes in response to new environmental conditions through natural selection and random mutations, while adaptive radiation involves the rapid evolution of more than one species from a single ancestral species. Choice D is incorrect, as analogous traits do not result from common ancestry.
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