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 cultiv3wo dlsw,2)j)y ftv3zation system tha 7bru5hpf++h ( +sfwlat eliminates the need for fertilizers, herbicides and pesticides by using duckspw(f7 lrah +u5h bs++f in the organic cultivation of rice. In addition, Azolla, an aquatic floating fern, is grown on these fields because it harbours 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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