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प्रश्न
Whales come up to the water surface to breathe in oxygen.
विकल्प
True
False
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उत्तर
Whales come up to the water surface to breathe in oxygen- True.
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संबंधित प्रश्न
Answer the question put against the following constituents of air :
Carbon dioxide : “Although carbon dioxide plays no role in respiration, all life would come to an end if there is no carbon dioxide in air.” Support this statement with relevant facts.
Name the main components of air.
Name the following:
The component of air which is present more in industrial areas.
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
Carbon dioxide, water vapour and energy in the form of heat are evolved during respiration.
______ is the percentage of nitrogen in air.
List out the uses of nitrogen.
Nitrogen is essential for burning.
State whether the following statement is true or false. If false, correct them.
Plants consume oxygen for respiration.
Make sentences using the given set of words.
99%, oxygen, nitrogen, air, together
Explain the following observations very briefly
Breathing through mouth may harm you.
