Quelpr
2 marksWater and the Aquatic Environment

CSEC Integrated Science · 2006 · Paper 2 · Question 5(c)(ii)

Gardeners notice decreased produce (okras, tomatoes, peppers) despite abundant flowers, and fewer fish in the river after using the insecticide.

How could spraying of the new insecticide be responsible for the decrease in the number of fish?

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 5(a)(i)Complete Table 2 by writing the description for parasites for both 'Type of habitat' and 'How they obtain food'.[2 marks]
  2. 5(a)(ii)Name TWO common household pests.[2 marks]
  3. 5(b)(i)Suggest TWO factors that might be responsible for the increase in the number of flies in the rural community.[2 marks]
  4. 5(b)(ii)In addition to using insecticides, suggest ONE other method which the residents could use to control the number of flies.[1 mark]
  5. 5(c)(i)How could spraying of the new insecticide be responsible for the decrease in produce from the gardens?[2 marks]
  6. 5(d)(i)a)State the effect reducing the insect population would have on the weed population.[1 mark]
  7. 5(d)(i)b)State the effect reducing the insect population would have on the spider population.[1 mark]
  8. 5(d)(ii)Select ONE food chain from the food web in Figure 7 and write it down.[2 marks]

More practice: the rest of this paper · more Water and the Aquatic Environment questions · all CSEC Integrated Science past papers