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Question

Why do we need to change water frequently in an aquarium?


  1. For the supply of carbon dioxide

  2. For the supply of oxygen

  3. None of these

  4. For the supply of food


Solution

The correct option is B

For the supply of oxygen


By changing water we are maintaining the continuous supply of dissolved oxygen which is needed by the fish for respiration. Respiration is a process in living organisms involving the production of energy, typically with the intake of oxygen and the release of carbon dioxide from the oxidation of complex organic substances.

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