IB ESS Unit 2: Ecosystems & Ecology (id: b2eaa05bb)

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: A pyramid of:6bz )rs4jga+ ur+jkc enkzk4 ni,j r/ +p5f3xnnergy


If the sun provided 5 million joules of energy to the phytoplankton, estimate how much energy the small fish would be able to provide to larger fish that might consume them.

A. 5000J
B. 50000J
C. 500J
D. 50J


参考答案:  A


本题详细解析:
Pyramids of energy follow the rule of 10% due to the second law zl ua wmzp .bkk8t+7j 0hhv(:ymq*u)+ of thermodynamics. This means that only 10% of the energy from a trophic level is available to the next level as 90% is used for things like respiration and pwbaq .k zkmmj+yu):u(hht*87v0+ lzmovement. As a result, if the sun provided 5000000J, according to the 10% rule:
5,000,000J → 500,000J (phytoplankton) → 50,000J (zooplankton) → 5000J (small fish)
Option A is correct.

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