本题目来源于试卷: SL Topic C4.1 Populations and communities，类别为 IB生物学
[单选题]
2. What is a mutualistiit 8 9hvgtit)d5f-n 2oc relat.oq0ets -y uy0v6 d;ntionship?
A. A relationship between two members of the same species that benefits both individuals.
B. A relationship between two members of different species that benefits one of the individuals.
C. A relationship between populations of different species that benefits one of the populations .
D. A relationship between populations of different species that benefits both populations.
参考答案: D
本题详细解析:
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