本题目来源于试卷: IB ESS Unit 2: Ecosystems & Ecology，类别为 IB环境系统与社会
[单选题]
Figure: Flow of energy i -99fw fb/5lygmz6kwi n an ecosystem / hq3- g gb,) z8h 33vcotjsfjth(h*yp0per area per year
Estimate the percentage of energy from the producers reaches the tertiary consumers.
A. 100%
B. 10%
C. 1%
D. 0.1%
参考答案: D
本题详细解析:
As energy moves from producers to consumers, only v06w.nmh /k i85-cuiypbv g2s6jud*1ruzvk: about 10% is transferred to the next trophic level. So only about 0.1% of the energy produced by the producers reaches the tertiary consumers. All other options (Options A, B, C) are not correct. Looking at the values in the diagram, producers start with 20 000 units of .kvn6*u:d h1uvys/mi izr6 k058p-cj v2 g ubwenergy and tertiary consumers receive only 25 units. 25 divided by 20 000 is approximately 0.1%
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