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4 marksNutrient Cycles and Energy Flow

CAPE Environmental Science Unit 1 · 2008 · Paper 2 · Question 3(a)(ii)

A diagram illustrates the cycling of matter through an ecosystem involving primary producers, primary consumers, secondary consumers, and detritus and decomposer food chains.

Explain the importance of the decomposer food chain in the cycling of matter illustrated in Figure 1.

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Other parts of this question

  1. 3(a)(i)Name TWO decomposers and state ONE source of energy for EACH.[4 marks]
  2. 3(b)(i)State TWO benefits of natural ecosystems to humans, giving an example of EACH.[4 marks]
  3. 3(b)(ii)Describe TWO ways in which human activities can disrupt the integrity of natural ecosystems.[8 marks]

More practice: the rest of this paper · more Nutrient Cycles and Energy Flow questions · all CAPE Environmental Science Unit 1 past papers