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Organisms reproduce by asexual means too. Fungi multiply and spread easily due to the millions of asexual spores they produce. In lower organisms like yeast and hydra ,we observe budding. In planaria we observe true regeneration i.e.,a fragmented organism regenerates the lost part of its body and becomes a new organism. The fungi,filamentous algae,protonema of mosses all easily multiply by fragmentation. asexual reproduction is by the production of different types of spores in,algae. The,most common is zoospores. They are flagellated and on germination gives rise to new plants. Vegetative reproduction in algae is by the production of fragments in their body which will ultimately gets separated and will grow as a new one. asexual reproduction of in liverworts takes place by fragmentation of thalli or by the formation of specialised structures called gemmae. Gemmae are green multicellular asexual buds which develop in small receptacles called gemma cups located on thalli. The gemmae become detached from the parent body and germinate to,form,new individuals. vegetative reproduction in mosses is by fragmentation and budding in the secondary protonema.
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1.binary fission -it is simple and most common method of asexual reproduction.
the nuclecus of unicellular parent organism divides into two.this is followed by the division of cytoplasm . ex amobea, eulgena
2 . multiple fission-  when number of daughter cell are formed from a single parent at the same time this kind offission is callend multiple fission.
ex plasmodium
3.budding-in case of sponges,the parent relesed the splecialisedmass of cell called gemmule. it thought to b e internAL BUD WHICH GIVE RISE TO OFFSPRING.Ex hdra
4. FRAGMENTATION- in some organism body breaks fast and each dvelop into complete organism . EX SOME flat worms.
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