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 insect-9 ojr4rs 2 5s:muzi3ohpollinated j;h ewdrs piy)9*0mb.flowers are adaptations for mutualistic relationships with pollpi0w; *ey 9rhdsj.mb)inators?
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 insect-pollinated flowersrvg0lpvx7/5il ;9o f bcqb t+9 have coloured petals (Statement II) to attract pollinators and a nectary (Statement I) to reward them, whe bq lrxl5 i99gocb0pv7vt/+f; reas all 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.
| 
