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JAMB Biology 2007 Question 4

Question 4

Ecological Associations

Which of the following is an example of parasitism?

  1. A.Fungi growing on a dead tree branch.
  2. B.A squirrel living in an abandoned nest of a bird.
  3. C.Mistletoe growing on an orange tree.
  4. D.Cattle egrets taking ticks from the body of cattle.
Show the answer and explanation

Answer: C (Mistletoe growing on an orange tree.)

Explanation

Mistletoe sends haustoria into the orange tree and takes water and minerals from it, harming the host. Fungi on dead wood are saprophytes, and the egret and cattle both gain.