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(C) The phenomenon of retention of the female gametophyte with the developing young embryo on the parent sporophyte is a significant evolutionary prec

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Pteridophytes

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(C) The phenomenon of retention of the female gametophyte with the developing young embryo on the parent sporophyte is a significant evolutionary precursor to the seed habit.In $Pteridophytes$,specifically in heterosporous species like $Selaginella$ and $Salvinia$,the female gametophytes are not fully independent but are retained on the parent sporophyte for variable periods.This development represents an important step in evolution towards the seed habit found in $Gymnosperms$ and $Angiosperms$.

From an evolutionary point of view,the retention of the female gametophyte with the developing young embryo on the parent sporophyte for some time is first observed in:

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