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WAEC Biology 2009 Question 45

Question 45

Population Ecology

In ecological succession, since lichens grow on bare rock, they are considered to be

  1. A.primary consumers.
  2. B.pioneer organisms.
  3. C.climax organisms.
  4. D.producers.
Show the answer and explanation

Answer: B (pioneer organisms.)

Explanation

The first organisms to colonise a bare area are called pioneers; lichens break down rock and start soil formation.