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 insectkk/9tp1zg+ ) cj+k td*:d df.t2qanmx-p3erg / tvi9c ax19p4wxollinated flowers are adaptations for mutualistic relationshipv9w 1c934gpxetx/ai r s 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 beca,s6 s mdwe0wq+-o-a oluse insect-pollinated flowers have coloured petals (Statement II) to attract pollinators and a nectary (Statement I) to reward them, whereas al owo w0qal +ss6--md,el flowers have a stigma (Statement III). Choice A is incorrect 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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