Origin of earth dates back to

  • A

    $10,000-15,000$ million years ago

  • B

    $4000-4600$ million years ago

  • C

    $500-1000$ million years ago

  • D

    $2000-3000$ million years ago

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$A$ : During evolution the early time period was without ozone layer.
$R$ : Ozone layer absorbs $U.V.$ rays to some extent.

After about how many years of formation of earth, life appeared on this planet?

  • [NEET 2020]

State the theory of abiogenesis. How does Miller’s experiment support this theory ?
 

Evolution is regarded as

Describe various theories of origin of life.