Question

Lower plants vs higher plants in terms of life cycles as well as which stage is sexual?

Answer 1

1. In lower and higher plant reproduction happen by two method sexual and asexual method and there life cycle going on  

In plant reproduction ( life cycle ) going on by two phases sporophytic ( asexual method) and gametophytic ( sexual phase ) after that each gametophyte than reproduce sexually and give rise to a sporophyte.

LIFE CYCLE OF LOWER PLANT :-

In lower plant not able to produce seed they produce special type of cell called spore and this spore capable of giving sporophytic generation .

On lower plants like algae , bryophyta and some pteridophyt gametophyte generation more prominent than sporophyte generation . Some special organ is present in lower plant that are produce spore.

This lower plant also reproduce vegetativlve also

In algae :- By Akinetes , aplanospore , zoospore etc.

In bryophyta :- fragmentation of protonema , formation of gemmae and bulbils etc.

In bryophyta sexual reproduction contain two alternative generation sporophyte and gametophyte generation. In lower plant gametophyte generation more dominant on which adult sporophyte dependent for nutrition .

Haploid spore from from sporophytic generation germinate to give gametophyte and gametophyte is a sexual phase , gametophyte devlope sex organ which produce gamet and haploid sex cell ( gamet ) that participate in fertilization to form diploid zygote and zygote devloped into diploid plant .

Some time young gametophyte live for a long time.

life cycle of higher plant :-  in the seeded plant reproduction happen in both asexually ( vegetative method ) and sexually.

In the seeded plant like angiosperm and gymnosperm sporophyte phase is more prominent than gametophyte stage.

Sporophyte produce spore by meiosis , they produce microspore and andcrospore are devloped into gametophyte , that may be male and female gametophyte after that microspore from male gametophyte and megaspore from female gametophyte are fused ( fusion of male and female gamet ) and produce diploid zygote and this zygote produce diploid plant .

So this is the difference between lower and higher plant life cycle.

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