Life cannot originate from inorganic materials now because of

  • A

    Low atmospheric temperature

  • B

    High degree of pollution

  • C

    High atmospheric oxygen

  • D

    Absence of raw materials

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Column $I $                         Column $ II$

(Branch of biology)           (Field ofstudy)

$A$ Palynology                  $p$ Silkworms

$B$ Oncology                     $q$ Pollens

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$D$ Sericulture                   $s$ Algae

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Mutation introduces new genes into a species and brings about the changes in