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प्रश्न
Fill in the blank
Aquatic plants and animals use _________ in water.
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उत्तर
Aquatic plants and animals use dissolved oxygen in the water.
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संबंधित प्रश्न
What are the two ways in which nitrogen fixation occurs?
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Tick (√ ) the most appropriate answer.
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State what would happen, if the air above the earth contained mainly oxygen and no nitrogen
Nitrogen is used in the food packaging industry because it _____.
_______ can be seen moving in a beam of sunlight in a dark room.
The Scottish chemist ______ discovered carbon dioxide is present in air.
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Nitrogen gas is so cold that moisture in the air condenses on it, creating a dense fog.
