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(i) Why are aquatic species more comfort...

(i) Why are aquatic species more comfortable in cold water than in warm water ? (ii) What happens when we place the blood cell in saline water solution (hypertonic solution) ? Give reasons.

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(i) Solubility of a gas in water decreases with rise of temperature. Less oxygen is available to aquatic species in water. (ii) Blood cells shrink because concentration is more in saline water than in blood cells.
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