MCQ
The first cellular form of life could have originated
- ✓$2000$ million years back
- B$11000$ million years back
- C$1500$ million years back
- D$500$ million years back
✓
Answer
Correct option: A.
$2000$ million years back
a
$2000$ million years.
$2000$ million years.
Experimental Evidences of Chemical Evolution
Experi ik mentally chemical theory of evolution performed by SL Miller and HC Uray in $1953 .$
He created electric discharge in a closed flask containing $CH _{4}, H _{2}, N H _{3}$ and water vapour at $800\, C .$ He observed formation of amino acids. In similar experiments other the observed, formation of sugar, nitrogen bases, pigments and fats
The first non-cellular forms of life could have originated-$3$ billion years back. The first cellular form of life did not possibly originated till about $2$ billion years ago because the conditions were non-biogenic at that time. This version of biogenesis, $i.e.,$ the first form of life arose slowly through evolutionary forces from non-living molecule was accepted by majority
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