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 system that eliminates the ne7ge9uwn+d biy8v 7 fv:ed for4tlr4n .sg, nov5zg 4e 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 harbours blue-green algae which can fix atmospheric nitrogene 4z o4rv,g n5st4g.ln. 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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