When and how did life begin?

1.	When and how did life begin?
Answer» Life originated on Earth about 3.5 billion years ago. Life originated as a result of very slow and gradual process. Initially, the atmosphere of earth was reducing. The conditions favorable for life were there at that time which are not present now. Some amino acids were formed as a result of some chemical reactions. Primary simple cell is formed by some combination of amino acids which gave rise to different individuals.

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