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Question

Aquatic animals use _________ in water for respiration.


  1. Dissolved salts.

  2. Dissolved oxygen

  3.  Oxygen atom present in water molecule

  4.  Dissolved carbon dioxide


Solution

The correct option is B

Dissolved oxygen


Like every animal, aquatic animals also need oxygen to survive. But instead of breathing in oxygen from the air, they absorb dissolved oxygen from the water.

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