The first non-cellular form of life could have originated about $. . . . .$ years ago.
The first non-cellular form of life could have originated about $. . . . .$ years ago.
- A
$3 \;million$
- B
$2\; million$
- C
$3\; billion$
- D
$2\; billion$
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If you go back in the history approx. $4500$ million years back when atmosphere was reducing the organism were
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