CSEC Biology · May/June 2011 · Paper 2 · Question 3(c)(iv)
Suggest why energy from the sun flows in one direction while materials are cycled within the ecosystem.
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- 3(a)Explain the unique role of producers in the ecosystem.[1 mark]
- 3(b)(i)Identify A and B.[2 marks]
- 3(b)(ii)Using a named example, explain the role of B in the ecosystem.[2 marks]
- 3(c)(iii)Give ONE example of a decomposer and explain how a decomposer releases carbon dioxide to the atmosphere.[3 marks]
- 3(d)In addition to energy, materials are also cycled through various trophic levels and the abiotic environment. Using a diagram of the nitrogen cycle, show FOUR…[4 marks]
- 3(e)State the name of the organism responsible for ONE of the processes named in (c) above.[1 mark]
More practice: the rest of this paper · more Food Chains, Food Webs, and Decomposers questions · all CSEC Biology past papers