Form and Function B.10 Ecological Niches (id: 8021cc8e4)

本题目来源于试卷: Form and Function B.10 Ecological Niches，类别为 IB生物学

[单选题]
The illustration shows a rice cultivation sly hwx n, :0e7-zx6kcmystem thatape60 55r e4cxr1qnu an,u rfg8:p7lc eliminates the need for fertilizers, herbicides and pesticides by using ducks in the organic cultivation of rice. In addition, Azolla, an aquatic floating fern, is grown on these fields because it harbcenp8rx,rrga6n a1ef 5 up4ql5cu07 :ours blue-green algae which can fix atmospheric nitrogen. Using this system, rice, ducks, and fish can all be produced for human consumption in one location.

A. Azolla and rice
B. Azolla and ducks
C. Rice and fish
D. Fish and ducks


参考答案:  A


本题详细解析:

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