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In which one of the following, male and female gametophytes do not have free-living independent existence?
A
Polytrichum
B
Cedrus
C
Pteris
D
Funaria
Detailed Solution
Cedrus (deodar) is a gymnosperm.
In gymnosperms the male and female gametophytes do not have an independent free-living existence.
They remain within the sporangia, which are retained on the sporophyte: the male gametophyte is the highly reduced pollen grain, and the female gametophyte develops inside the megasporangium (ovule).
Polytrichum and Funaria are mosses (bryophytes), in which the gametophyte is the dominant, green, free-living plant body.
Pteris is a fern (pteridophyte), in which the gametophyte is a small but independent, free-living, photosynthetic prothallus.
So the male and female gametophytes are not free-living in Cedrus.
In gymnosperms the male and female gametophytes do not have an independent free-living existence.
They remain within the sporangia, which are retained on the sporophyte: the male gametophyte is the highly reduced pollen grain, and the female gametophyte develops inside the megasporangium (ovule).
Polytrichum and Funaria are mosses (bryophytes), in which the gametophyte is the dominant, green, free-living plant body.
Pteris is a fern (pteridophyte), in which the gametophyte is a small but independent, free-living, photosynthetic prothallus.
So the male and female gametophytes are not free-living in Cedrus.