Question

how old is earth and who were the first specie in it ?​

Answer 1

Answer:

The earliest time that life forms first appeared on Earth is at least 3.77 billion years ago, possibly as early as 4.28 billion years, or even 4.5 billion years; not long after the oceans formed 4.41 billion years ago, and after the formation of the Earth 4.54 billion years ago.

Explanation:

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Answer 2

Answer:

origin of Universe - 20bya

Origin of Earth - 4.5bya

bya - billion years ago

first sign of Life - 4bya

Origin of non cellular life - 3bya

origin of cellular life - 2.5bya

Explanation:

Reference

NCERT class 12 Biology.

NCERT par doubt kabhi mat karna