本题目来源于试卷: Interaction & Interdependence C.8 Populations & Communities，类别为 IB生物学
[单选题]
Which parts of insectu8pu*ztjla ;/ -pollinb+mz-1k7ksje ar7q hgc (mo33ated flowers are adaptations for mutualistic relationships k +abgme3 s hoqcj(177mk3rz- with pollinators?
I.
Nectary
II.
Coloured petals
III.
Stigma
A. I only
B. I and II
C. II and III
D. II and III
参考答案: B
本题详细解析:
Choice B is correct because n h2tz g/c+t:vinsect-pollinated flowers have coloured petals (Statement II) to attract pollinators and a nectary (Statement I) to reward them, whereas all flowers have a stigma (Statement III). Choice A is incorr/gtn 2+vz:tch ect because both statements I and II are correct. Choices C and D are incorrect because the stigma is not adapted for a mutualistic relationship with insects. Only the flower benefits from the presence of a stigma.
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