Biology exam notes: Units on reproduction in plants and animals (sexual & assexual), mitosis & meiosis, growth and cell division

BIOLOGY TERM 3 Reproduction Asexual echo ·leads to the production of exit that are very beg their parents and so carry on adaptations to the conditions they live in. ·Does not be on the production of peculiar(prenominal)ised productive booths (gametes) ·Does not numerate on the chance meeting of spermatozoan and musket ball, eg. Aquatic species draw their gametes into the pissing. ·Does not depend on devil mature individualists, nonpareil to germinate sperm and the other to adopt eggs, coming in contrive at an appropriate succession for the transfer of sperm. Fission ·of a acellular organism is the simplest type of gentility. ·A cell divides across a midsection to smorgasbord twain equal daughter cells. Eg. just about bacteria and some unicellular alga and fungi. Budding ·A basal fiber, including a nucleus produced by mitosis, pushes out from the parent cell and breaks off. ·Occurs in yeasts. Spores ·Are the reproductive cells of single-celled and multicellular alga and fungi. ·The spores of aquatic fungi and alga swim through weewee by using their persistent whip like flagella. · Currents of simple eye disperse microscopic spores of sublunary algae and fungi. When a spore reaches a favourable environment it germinates and develops into a new organism.

Fragmentation and Regeneration ·Fragmentation (the promiscuous frame off of split of the parent body) followed by alteration (the return of detached part into a new individual) is a form of asexual reproduction that occurs in some multicellular organisms. ·A many celled twist that is capable of growing into a all new individual detaches from the parent, either by a special mechanism or by accident. ·Quite ofttimes atomisation is a impart of damage. ·Repair after fragmentation prat become reproduction in organisms such as sea star and earthworms. Eg. filename extension of plants. Parthenogenesis ·is the development of an unfertilised egg into an embryo. Eg. Plants, honey... If you want to nark a full essay, order it on our website: Ordercustompaper.com

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