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Tuesday 11 February 2014

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

BIOLOGY TERM 3 Reproduction Asexual education ·leads to the production of offspring that are very bid their heightens and so carry on adaptations to the conditions they live in. ·Does not be on the production of peculiar(prenominal)ised reproductive cells (gametes) ·Does not numerate on the possibility meeting of sperm and egg, eg. Aquatic species draw their gametes into the pissing. ·Does not imagine on two mature case-by-cases, nonpareil to produce sperm and the other to produce eggs, coming in concert at an appropriate time for the transfer of sperm. Fission ·of a single-celled organism is the simplest type of comeback. ·A cell divides across a midsection to smorgasbord two equal daughter cells. Eg. some bacteria and some unicellular alga and fungi. Budding ·A baseborn lay out, 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 cell ular algae and fungi. ·The spores of aquatic fungi and algae swim by means of water by using their long whip desire flagella. · Currents of bloodline disperse microscopic spores of terrestrial algae and fungi. When a spore reaches a favourable environment it germinates and develops into a new organism. atomization and Regeneration ·Fragmentation (the open frame off of separate of the parent body) followed by regeneration (the return of detached part into a new individual) is a form of asexual return that occurs in some multicellular organisms. ·A many celled complex body part that is capable of growing into a all new individual detaches from the parent, either by a special mechanism or by accident. ·Quite frequently atomisation is a dissolvent of damage. ·Repair after fragmentation prat become reproduction in organisms such as sea star and earthworms. Eg. extension phone of plants. Parthenogenesis ·is the development of an unfertilised egg into an embryo. Eg. Plants, honey... ! If you want to mystify a full essay, order it on our website: OrderCustomPaper.com

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