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4 marksEcosystem Dynamics and Community Stability

CAPE Environmental Science Unit 1 · 2012 · Paper 2 · Question 1(b)

Using the information provided in Figure 1, describe the trend in population size of the duckweed.

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Other parts of this question

  1. 1(a)Using an example other than agrochemicals, explain what is meant by the term 'limiting factor'.[4 marks]
  2. 1(c)(i)It was determined that there was a high concentration of phosphate and nitrate in the effluent. Using the information in Figure 1, explain why the effluent…[8 marks]
  3. 1(c)(ii)Explain how the variation in the duckweed population may impact on the population of other aquatic species in the same ecosystem.[4 marks]

More practice: the rest of this paper · more Ecosystem Dynamics and Community Stability questions · all CAPE Environmental Science Unit 1 past papers