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8 marksNutrient Cycles and Energy Flow

CAPE Environmental Science Unit 1 · 2004 · Paper 2 · Question 3(c)

A simple food chain showing corn consumed by both cow and man, and cow consumed by man, is provided in Figure 2.

With reference to Figure 2, explain why it is more energy efficient for humans to eat at lower trophic levels.

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Other parts of this question

  1. 3(a)Give four reasons why, in an ecosystem, a food web is generally more useful than a food chain.[4 marks]
  2. 3(b)Outline four reasons for assigning trophic levels to each organism in an ecosystem.[8 marks]

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