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Selaginella and Salvinia are considered ...

Selaginella and Salvinia are considered to represent a significant step toward evolution of seed habit because

A

female gametophyte is free and gets dispersed like seeds

B

female gametophytes lack archegonia

C

megaspores possess endosperm and embryo surrounded by seed coat

D

embryo develops in female gametophyte which is retained on parent sporophyte.

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