NEET 2011 Biology question

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

(1)Female gametophyte is free and gets dispersed like seeds
(2)Female gametophyte lacks archegonia.
(3)Megaspores possess endosperm and embryo surrounded by seed coat.
(4)Embryo develops in female gametophyte which is retained on parent sporophyte.Correct

Answer: (4)

Solution

Selaginella and Salvinia are heterosporous pteridophytes. Their megaspores germinate into female gametophytes that are retained on the parent sporophyte (within the megasporangium), and the zygote develops into a young embryo inside the female gametophyte while it is still attached to the parent. This retention of the

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Question ID VK-090718