本题目来源于试卷: Interaction & Interdependence C.9 Transfers of Energy & Matter，类别为 IB生物学
[单选题]
Which of the following statements are corre3ld npg2ygrwj i +e* v)pk8f7*ct descriptions of food chains?v yze7-k7aeg +ad6n4 z
A. The most abundant organisms in a food chain are the secondary consumers.
B. Autotrophs are producers and form the base of the food chain.
C. Energy enters a food chain via tertiary consumers.
D. The flow of energy is from secondary consumers to primary consumers to producers.
参考答案: B
本题详细解析:
Explanation: Autotrophs are producers and form the base of food chains. They carry out photosynthesis and get their energy from the Sun. The most abundant organisms (Choice A) are usually the producers but there are exceptions. Energy always enters the food chain via the autotrophs, not consumers (Choice C). The flow of energy (Choice D) is from producers to primary to secondary to tertiary consumers.
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