NEET-XII-Physics
Previous Year Paper year:2017
- #146From evolutionary point of view, retention of
the female gametophyte with developing
young embryo on the parent sporophyte for
some time, is first observed in
(1) Liverworts
(2) Mosses
(3) Pteridophytes
(4) GymnospermsdigAnsr: 3Ans : ( 3 )
Sol. In Pteridophyte, megaspore is retained for
some times in female gametophyte, however
the permanent retention is required for seed
formation in Gymnosperms.
That's why Pteridophytes exhibit precursor to
seed habit only.