$S$: In $Pteridophytes$,spores are produced in sporangia.
$R$: In $Pteridophytes$,sporangia are produced on sporophylls.

  • A
    $S$ and $R$ are true,and $R$ is the correct explanation of $S$.
  • B
    $S$ and $R$ are true,but $R$ is not the correct explanation of $S$.
  • C
    $S$ is true and $R$ is false.
  • D
    $S$ is false and $R$ is true.

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Heterospory,i.e.,the formation of two types of spores—microspores and megaspores—is a characteristic feature in the life cycle of a few members of pteridophytes and all spermatophytes. Do you think heterospory has some evolutionary significance in the plant kingdom?

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