On Earth, where did life began?

Answer 1

Perhaps, from somewhere or from quite many regions. life came as single-cell bacteria that need no oxygen or water, to live for thousands of yeas, before oxygen appeared 2.5 BY ago.

Life-form might have come before oxygen appeared 2.5 BY ago.

It came as single-cell bacteria that need no oxygen or water., to live

as such, for thousands of years.

This unicellular life-form could have been transported to the Earth

from some other space bodies, when they braced, brushed or

impinged on the Earth.

If so, the region from where life started on the Earth might be a local

region or a spherical narrow band upon the Earth.

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Answer 2

Ariana Acosta

Between 3.5 and 4 billion years ago, life on Earth most likely started in the oceans, near hydrothermal vents, or in shallow water settings.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.