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3 marksHuman Impact on the Environment

CSEC Biology · January 2014 · Paper 2 · Question 5(b)(i)

In a river near to a farming community, there are numerous dead organisms and an overgrowth of algae.

Explain how excess nitrate fertilizer may be responsible for the overgrowth of algae and death of the aquatic organisms.

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Other parts of this question

  1. 5(a)(i)Draw a simplified labelled diagram of the nitrogen cycle to show THREE processes that involve bacteria and ONE process that does not involve bacteria.[4 marks]
  2. 5(a)(ii)State TWO consequences of nitrogen deficiency in plants.[2 marks]
  3. 5(b)(ii)Discuss THREE ways in which this problem could be remedied.[6 marks]

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