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GCE Biology 1989 Question 45

Question 45

Feeding Relationships and Energy Flow

Which of the following effects would desertification have on the ecological balance represented in the diagram above? The calorific value of the energy

Diagram for this question
  1. A.10 x 104k cal obtained from the sun would decrease
  2. B.10 x 104k cal obtained from the sun would increase
  3. C.6 x 104k cal obtained at level I would increase
  4. D.1 x 104k cal obtained at level V would increase
  5. E.3.5x 104k cal obtained at level II would increase
Show the answer and explanation

Answer: A (10 x 104k cal obtained from the sun would decrease)

Explanation

Desertification destroys the grass and other producers, so less of the sun's energy is captured by the ecosystem and every level gets less.