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WAEC Agricultural Science 2015 Question 48

Question 48

Fisheries and Aquaculture

The effect of fertilizing a fish pond with compost manure on phytoplankton population and fish yield is such that

  1. A.phytoplankton population decreases as fish yield decreases.
  2. B.phytoplankton population decreases while fish yield increases.
  3. C.phytoplankton population increases while fish yield decreases.
  4. D.phytoplankton population increases as fish yield increases.
Show the answer and explanation

Answer: D (phytoplankton population increases as fish yield increases.)

Explanation

Manure feeds phytoplankton, which is food for fish, so both increase.