Question

Gametophytic plant body is nonvascular in
A ) Algae and liverworts
B) Mosses and ferns
C) Gymnosperms and angiosperms
D) All of these

Answer 1

Hint: Plants show alternation of generation between Gametophytic body and sporophytic plant body. The gametophyte is haploid and multicellular. It produces gametes that fertilize and form a zygote. Cell division in the zygote leads to the diploid sporophyte which produces haploid spores by the process of meiosis.

Complete answer: Algae and liverworts haven non-vascular gametophyte. In some algae such as red and brown algae sporophyte and gametophyte are isomorphic i.e., indistinguishable, and in some algae, such gametes are of the same size, shape, and morphology and are known as isogamous. In bryophytes such as liverworts, mosses gametophyte is the dominant stage as it is long-lived sporophyte is dependent on gametophyte and is attached to gametophyte In Bryophytes, gametes are produced in a specialized structure known as gametophores.
-Ferns are vascular plants but mosses are avascular. Gametophyte in ferns is photosynthetic free-living and is known as prothallus. The gametophyte is exospheric as it develops outside the spore wall.
-In gymnosperms male and female gametophytes are produced on separate male and female cones. Female cones are bigger than male cones. The green leafy sporophyte produces cones having male and female gametophytes.
-In angiosperms, the gametophyte is of few cells. The male gametophyte is known as pollen and the female gametophyte is known as the embryo sac. Both angiosperms and gymnosperms are vascular plants.

Note: Algae and liverworts have non vascular body. Gametophytes in algae and bryophytes are
dominant stages and produce gametes. Ferns are vascular but mosses are avascular. Gymnosperms
and angiosperms both are vascular. In gymnosperms, gametophytes are distinguishable and are
produced in male and female cones whereas in angiosperms gametophytes are made up of very few
cells are known as pollen and embryo sac.