Sporangia are associated with sporophylls. In | vedclass

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(B) In Pteridophytes,the sporangia are subtended by leaf-like appendages called sporophylls.In some cases,such as in $Pteris$ (fern),the sporophylls m

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$Pteris \quad Selaginella, Equisetum$

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(B) In Pteridophytes,the sporangia are subtended by leaf-like appendages called sporophylls.In some cases,such as in $Pteris$ (fern),the sporophylls may form distinct,separate structures.In many other cases,such as in $Selaginella$ and $Equisetum$,the sporophylls may form distinct compact structures called strobili or cones.Therefore,$P$ represents $Pteris$ and $Q$ represents $Selaginella$ and $Equisetum$.

Sporangia are associated with sporophylls. In $P$ plants,sporophylls are distinct,while in $Q$ plants,sporophylls form compact structures called strobili or cones.
$P \quad Q$

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Sporangia are associated with sporophylls. In $P$ plants,sporophylls are distinct,while in $Q$ plants,sporophylls form compact structures called strobili or cones.$P \quad Q$