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 cumgdtvsj1g az)a .k 41 tx5mw-,lneh a5/bbs2v vs0/g o:tivation system that eliminates the need for fertilizers, herbicides and pesticides by using ducks in the organic cultivation of rice. In addition, Azolla, an2/svan:h b0b/g s e5ov 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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