Question

How did life begin?


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Answer 1

Explanation:

Life begins when a spermatozoon (a mature male germ cell) and an ovum (a mature female germ cell) unite to form one single cell called “egg” or “zygote”, which as of that moment, will undergo a series of divisions that will ultimately result in the birth of an infant.

Answer 2

Answer:

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Explanation:

At first, it was thought that the Earth's atmosphere consisted of hydrogen compounds—methane, ammonia and water vapour—and that life began under such reducing conditions, which are conducive to the formation of organic molecules.