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]
It is thought that the congo river divided a popul reg5,7aryjpnir+ v p+vpi- : (ation 3b 78 cydyrv*t*xn8oq2 -vzbu of the common ancestor of bonobos (Pan paniscus) and chimpanzees (Pan troglodytes), resulting in geographic isolation. Which co *v -rybqbdnv8o8xcy7u z t32* rrectly pairs theoretical selection pressures and consequent adaptations of the two populations?
A.
B.
C.
D.
参考答案: B
本题详细解析:
Choice B is correct because a scarcity of food as well as competition with gorit wx9 nmz9.t6 bf(g+ 2u a5l:d+hdhcujllas, led to increased aggression in the ancestral population to chimpanzees and plentiful food on the south side of the river, as well as an absence of gorillas led to increashhw+ujnf5a6 :t+.9 xz29 cub dm(ldtg ed cooperation in the ancestral population of bonobos.
Choice A is incorrect because there was and is no difference in solar radiation on either side of the Congo River. Choice C is incorrect because the selection pressures and adaptations are reversed in terms of where they existed (south side vs. north side). Choice D is incorrect because food scarcity led to more aggression, and plentiful food led to more cooperation.
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