Which gas is present in less than about one percent of the atmosphere and is important for photosynthesis and the greenhouse effect?
Answer and explanation
Correct answer: Carbon dioxide
Carbon dioxide forms only a very small fraction of the atmosphere, yet it has major roles. Plants absorb it as a raw material for photosynthesis, and it also absorbs outgoing infrared radiation, contributing to the natural greenhouse effect. Thus B is correct. Nitrogen and oxygen are the two dominant atmospheric gases, so neither fits the stated trace-gas description.
Frequently asked questions
What is the correct answer to this question?
Carbon dioxide
Why is this the correct answer?
Carbon dioxide forms only a very small fraction of the atmosphere, yet it has major roles. Plants absorb it as a raw material for photosynthesis, and it also absorbs outgoing infrared radiation, contributing to the natural greenhouse effect. Thus B is correct. Nitrogen and oxygen are the two dominant atmospheric gases, so neither fits the stated trace-gas description.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting. Topic: Covers GAAP.
