Two gases used by aquatic plants and animals which are soluble in water are:

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Nitrogen and chlorine

Oxygen and Nitrogen

Oxygen and carbon dioxide

None of the above

answer is C.

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Detailed Solution

Aquatic plants and animals use carbon dioxide and oxygen dissolved in water.
The interaction between the gas molecules and the water molecules is what causes gas to dissolve in water. The amount of gas that may be dissolved in water depends on the temperature of the water. Cold water can dissolve more gas than hot water. Carbon dioxide dissolved in water bodies is critical for aquatic plant existence since it is used to create food through photosynthesis.

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