Quelpr
3 marksBiological Evolution

CSEC Biology · May/June 2017 · Paper 2 · Question 6(b)(ii)

Some environmentalists encourage the practice of introducing predators to an ecosystem to control a population of pests rather than the use of agricultural chemicals.

Explain how biological control may contribute to biological evolution through natural selection in an ecosystem.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 6(a)Using a suitable example of EACH, distinguish between a predator-prey relationship and parasitism.[6 marks]
  2. 6(b)(i)Outline THREE advantages and THREE disadvantages of this method of biological control compared to the use of chemicals.[6 marks]

More practice: the rest of this paper · more Biological Evolution questions · all CSEC Biology past papers