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WAEC Biology 2013 Question 42

Question 42

Ecological Associations

Rhizobium which lives in the root nodules of leguminous plants is an example of the association known as

  1. A.commensalism.
  2. B.epiphytism.
  3. C.mutualism.
  4. D.saprophytism.
Show the answer and explanation

Answer: C (mutualism.)

Explanation

Both benefit: the bacteria get food and shelter, and the plant gets fixed nitrogen.