CAPE Biology Unit 2 · 2006 · Paper 2 · Question 5(c)(ii)
Explain why food chains are generally limited to three or four links.
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Practise this questionOther parts of this question
- 5(a)(i)Define the term: Ecosystem.[1 mark]
- 5(a)(ii)Define the term: Habitat.[1 mark]
- 5(a)(iii)Define the term: Ecological niche.[1 mark]
- 5(a)(iv)Define the term: Food chain.[1 mark]
- 5(b)Discuss how the components in an ecosystem function to achieve and maintain ecological balance.[4 marks]
- 5(c)(i)Explain why the flow of energy through ecosystems is linear and NOT cyclical.[3 marks]
- 5(d)Describe the tree ecosystem in terms of: a pyramid of biomass, a pyramid of numbers, and a pyramid of energy.[6 marks]
More practice: the rest of this paper · more Energy Flow and Nutrient Cycling questions · all CAPE Biology Unit 2 past papers