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GCE Agricultural Science 1990 Question 53

Question 53

Fisheries and Aquaculture

Dissolved oxygen in fish ponds is maintained at normal level in order to

  1. A.accelerate decay of plant materials
  2. B.prevent disease attacks
  3. C.prevent acquatic plants from competing with fish
  4. D.keep fish activities normal
  5. E.improve the quality of fish.
Show the answer and explanation

Answer: D (keep fish activities normal)

Explanation

Fish need dissolved oxygen to breathe, feed and grow normally.