CSEC Biology · May/June 2008 · Paper 2 · Question 4(a)(iii)
Explain why the number of organisms decreases at the successive trophic levels.
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Practise this questionOther parts of this question
- 4(a)(i)Explain why food chains usually begin with a plant species.[8 marks]
- 4(a)(ii)Using an appropriate diagram, show how a plant or animal may belong to more than one food chain.[8 marks]
- 4(b)(i)Identify ONE relationship that is important in biological control and explain how this relationship functions in biological control.[7 marks]
- 4(b)(ii)Suggest TWO reasons why biological control is a preferred method of reducing pest populations compared to the use of pesticides.[7 marks]
More practice: the rest of this paper · more Food Chains, Food Webs, and Decomposers questions · all CSEC Biology past papers