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4 marksEcology, Niches, and Interactions

CAPE Environmental Science Unit 1 · 2017 · Paper 2 · Question 1(b)(ii)

The law of competitive exclusion states that no two species will occupy the same niche and compete for the same resources. Figure 1 illustrates the niches for Species A and Species B.

Draw a diagram similar to Figure 1 showing how the niches of the two species will change over time.

This question uses a figure or table from the paper — you'll see it when you practise.

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Other parts of this question

  1. 1(a)Define the term 'ecological niche'.[1 mark]
  2. 1(b)(i)State what the region 'X' represents in Figure 1.[1 mark]
  3. 1(c)(i)Identify two types of interactions, other than competition, between organisms in communities.[2 marks]
  4. 1(c)(ii)Define one of the types of interactions identified in (c)(i) and use an example to explain how it may influence the population numbers of an organism in an…[4 marks]
  5. 1(c)(iii)Outline the role of adaptation in addressing the interaction discussed in (c)(ii).[2 marks]
  6. 1(c)(iv)Discuss the relationship between species diversity and ecosystem stability.[6 marks]

More practice: the rest of this paper · more Ecology, Niches, and Interactions questions · all CAPE Environmental Science Unit 1 past papers