Why is oxygen being nearly one-fifth of the atmosphere considered sufficient for organisms?
Answer and explanation
Correct answer: Because it remains available for respiration and nitrogen helps maintain atmospheric balance
Atmospheric oxygen is present at about 21%, which is sufficient for aerobic respiration in most organisms under ordinary conditions. Nitrogen forms the largest share and dilutes oxygen, helping prevent extremely rapid combustion while maintaining a stable gaseous mixture. Option A is correct. Options B, C and D are false because organisms do need oxygen, it is not confined to rocks, and oxygen does not remove all water vapour.
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What is the correct answer to this question?
Because it remains available for respiration and nitrogen helps maintain atmospheric balance
Why is this the correct answer?
Atmospheric oxygen is present at about 21%, which is sufficient for aerobic respiration in most organisms under ordinary conditions. Nitrogen forms the largest share and dilutes oxygen, helping prevent extremely rapid combustion while maintaining a stable gaseous mixture. Option A is correct. Options B, C and D are false because organisms do need oxygen, it is not confined to rocks, and oxygen does not remove all water vapour.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting.
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