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WAEC Biology 2004 Question 42

Question 42

Pollution

When a farmer sprays crops with a pesticide, the pesticide becomes

  1. A.poisonous to all plants
  2. B.is broken down by soil algae
  3. C.easily washed down into lakes and rivers
  4. D.absorbed by bodies of mammals.
Show the answer and explanation

Answer: C (easily washed down into lakes and rivers)

Explanation

Rain carries sprayed pesticides off the farm into streams, lakes and rivers, where they pollute the water and harm aquatic life.