Consider the following statements A Life can originate on earth from pre existing life only B The at...........

General Science (Easy) Biology

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Consider the following statements :

A. Life can originate on earth from pre-existing life only.

B. The atmosphere of the primitive earth was reducing.

Which of these statement(s) is/are correct ?

A only

B only

Both A and B

Neither A nor B

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Explanation:

Both A and B

The early atmosphere of earth was made of nitrogen and carbon dioxide gases before life began. When the photosynthesizing organisms multiplied then the carbon dioxide was replaced by oxygen. So, the correct option is "reducing primitive atmosphere contributed to the origin of life, and the oxidizing one of today would hinder it".

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