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Why is the mixture of atmospheric gases necessary for life?

Answer and explanation

Correct answer: Because one gas alone cannot perform all biological and thermal functions

Direct answer: A is correct. The atmosphere contains gases with different, complementary functions. Oxygen supports respiration for many organisms. Carbon dioxide is required by green plants for photosynthesis and also participates in the greenhouse effect. Nitrogen is an important raw material for biological compounds after it is converted into usable forms, and water vapour helps produce clouds and rainfall. No single gas can perform all these roles. B is not a scientific reason; atmospheric transparency depends on how radiation interacts with gases and particles. C is wrong because atmospheric mixing does not dry oceans. D is meaningless and false because gases are not living things and are not confined to fossils. A correctly explains why the mixture, rather than one gas alone, supports life and Earth’s environmental processes.

Related tags

Atmospheric GasesLife SupportGas MixturePhotosynthesisGeographyClass 11Covers The Accounting EquationRecording Of Transactions (I & Ii)

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