Question

when and where does reduction division take place in the life cycle of a liverwort,a moss,a fern,a gymnosperm and an angiosperm

Answer 1

in liverwort the main plant body is haploid gametophyte. it produces gametes these
gametes fuse forming a diploid sporophyte.this sporophyte contain spore mother cells which undergoes reduction to form haploid spores

Answer 2

Answer:

Reduction division takes place in the following stages:

Liverworts

– Meiosis takes place in the spore mother cells of the capsule in sporangium resulting in haploid spore formation

Moss

– Meiosis occurs in spore mother cells of spore sacs in the capsule of sporangium

Fern

– sporangia are endured on sporophylls (fertile leaves). The process of meiosis occurs in spore mother cells of sporangium for the formation of haploid spores.

Gymnosperm

– meiosis occurs in microsporangia located in the microsporophylls, in the microspore mother cells for the formation of haploid pollen grains giving rise to male gametophyte

Angiosperm

– pollen grains that are formed in microspore mother cells leads to the formation of male gametophyte in the anther of the stamen. The megaspore mother cell located in the nucleus of the ovule undergoes meiosis for the formation of haploid megaspore which eventually forms the female gametophyte.