passwella.
Menu

GCE Biology 1989 Question 29

Question 29

Ecological Associations

Pests can be controlled without the subsequent danger of polluting the ecosystem by

  1. A.introducing a population of species similar to that of the pest
  2. B.increasing the population of the natural enemies of the pest
  3. C.eliminating the natural enemies of the pest
  4. D.keeping the population of natural enemies of the pest constant
  5. E.spraying the ecosystem with pesticide
Show the answer and explanation

Answer: B (increasing the population of the natural enemies of the pest)

Explanation

Biological control uses more natural enemies to reduce the pest, with no chemicals to pollute the environment.