Which atmospheric gas is most essential for respiration in living beings?
Answer and explanation
Correct answer: Oxygen
Oxygen is required for aerobic cellular respiration, in which cells release usable energy from food molecules. Consequently, option A is correct. Nitrogen is the most abundant atmospheric gas, but most organisms cannot use atmospheric nitrogen directly for respiration. Carbon dioxide is used by plants in photosynthesis, whereas ozone is a protective but reactive form of oxygen and is not the normal respiratory gas.
Frequently asked questions
What is the correct answer to this question?
Oxygen
Why is this the correct answer?
Oxygen is required for aerobic cellular respiration, in which cells release usable energy from food molecules. Consequently, option A is correct. Nitrogen is the most abundant atmospheric gas, but most organisms cannot use atmospheric nitrogen directly for respiration. Carbon dioxide is used by plants in photosynthesis, whereas ozone is a protective but reactive form of oxygen and is not the normal respiratory gas.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Introduction to Accounting. Topic: Accounting Information.
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