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WAEC Biology 2009 Question 33

Question 33

Habitats and Biomes

What is the critical limiting factor for plants below the photic zone in an aquatic ecosystem?

  1. A.Availability of nutrients
  2. B.Availability of water
  3. C.Intensity of light
  4. D.Carbon dioxide concentration
Show the answer and explanation

Answer: C (Intensity of light)

Explanation

The photic zone is the layer light can reach; below it there is too little light for photosynthesis.