IB ESS Unit 2: Ecosystems & Ecology (id: e030bed77)

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 in an ecosystem / p.zvv tntdms4w /2l0;ger ar3k 47lengdgx n*a+e2u +wu td8ea 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 producerhsoogj4e eq p vpg+:h9;x05w2s to consumers, only about 10% is transferred to the next trophic level. So only about 0.1% of the energy produced by t+2q:p v gpegooh j94he 50sw;xhe 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 energy and tertiary consumers receive only 25 units. 25 divided by 20 000 is approximately 0.1%

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