WAEC Biology 1999 Question 37

Question 37

Ecosystem and Ecological Factors

Which of the following is not a biotic factor?

  1. A.Parasites
  2. B.Predators
  3. C.Grazers
  4. D.Pressure
Show the answer and explanation

Answer: D (Pressure)

Explanation

Pressure is a physical (abiotic) factor; parasites, predators and grazers are living things.