Invertebrates were formed and active by the time of... (in $mya$)

  • A
    $100$
  • B
    $1000$
  • C
    $500$
  • D
    $2000$

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Similar Questions

Which of the following theories is related to the transfer of life from one planet to another?

The swan-necked flask experiment proved:

Assertion: The earliest organisms that appeared on the earth were non-green and presumably anaerobes.
Reason: The first autotrophic organisms were the chemoautotrophs that never released oxygen.

The spark-discharge apparatus to test the chemical evolution of life was designed by

Who performed the first experiment on chemical evolution and the origin of life?

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