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If photosynthetic life changed the atmosphere, what broad principle does this show?

Answer and explanation

Correct answer: The biosphere can also change other Earth systems

The governing concept is the active role of the biosphere in Earth-system change. Photosynthetic organisms use carbon dioxide and release oxygen; over long periods, this biological activity can alter atmospheric composition and influence oceans, rocks, and climate. Thus life is both shaped by its environment and capable of reshaping that environment. Option A is correct because it states that the biosphere can affect other Earth systems. Option B is the opposite of the evidence. Option C is incorrect because the atmosphere has changed substantially through geological time. Option D confuses a biological effect with solar wind, which originates from the Sun and is not produced by life. The example demonstrates reciprocal interaction rather than one-way environmental control.

Related tags

BiospherePhotosynthesisAtmosphereEarth SystemsEvolution Of The EarthThe Origin And Evolution Of The EarthGeographyClass 11 Mcq

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