CAPE Environmental Science Unit 1 · 2009 · Paper 2 · Question 3(c)
Explain how ONE density independent factor may impact the size of the snail population.
The mark scheme is shown once you've answered.
Practise this questionOther parts of this question
- 3(a)With reference to Figure 2, describe the variation in the population size of BOTH organisms over the eight-month period.[4 marks]
- 3(b)Outline how predation may be of benefit to the prey population represented in Figure 2.[4 marks]
- 3(d)Assess TWO possible impacts on the ecosystem if the population of snails is significantly reduced by draining the waterway.[8 marks]
More practice: the rest of this paper · more Ecosystem Dynamics and Community Stability questions · all CAPE Environmental Science Unit 1 past papers