Sake yiwuwar tohowarsu, ta fasali da kuma siffar

Sake yiwuwar tohowarsu - shi ne mai haifuwa da kwayoyin a cikin abin da babu wani hannu na sauran mutane, da kuma wasa nasu irin na faruwa ta raba daya ko a 'yan Kwayoyin daga masu juna biyu kwayoyin. A irin wannan tsari ne da hannu kawai mutum iyaye. A sakamakon mitotic cikakken bi da asali uwar cell.

Sake yiwuwar tohowarsu ne musamman sauki. Wannan shi ne saboda gaskiya da cewa kungiyar tsarin da guda-celled kwayoyin ne ma mun gwada sauki. Kwayoyin a cikin wannan yanayin na haifuwa haifa kansu sosai da sauri. A karkashin sharadi gwargwado, kowane awa yawan irin wannan Kwayoyin ne ninki biyu. Wannan tsari na iya ci gaba da illa ma sha Allahu, har can zai zama bazuwar canji a cikin kwayoyin code, da ake kira maye gurbi.

A yanayi, wannan ya auku a cikin haifuwa na shuke-shuke da kuma guda-celled dabbobi.

Sake yiwuwar tohowarsu, kwayoyin

Simple division lura a unicellular shuke-shuke da dabbobi, kamar ciliates, amoebae, da kuma wasu algae. Da farko, a cikin cell nucleus din da aka raba ta mitosis a rabin, sa'an nan da constriction da aka kafa, da kuma iyaye misali ne zuwa kashi biyu sassa cewa suna yara na kwayoyin.

A sake yiwuwar tohowarsu, dabbobi tsira kawai a wasu siffofin: Sponges, coelenterates, flatworms, tunicates. Wadannan sabon mutum kwayoyin samu ta hanyar dake tasowa ko fission, sa'an nan ware daga iyaye jiki sashi da ake kammala a gaban dukan. A wasu lokuta, da ikon ci gaba a cikin mutum kwayoyin a cikin dabbobi suna da sassan jiki. Complete hydra, misali, zai iya ci gaba daga biyu ta dari part. Lokacin da sake yiwuwar tohowarsu, sabuwar halitta samfurori Kwatsam daga mahara Kwayoyin ta hanyar daya ko mitotic rarrabu ba guda kwayoyin bayanai, wanda mallaka cell iyaye kwayoyin.

Sake yiwuwar tohowarsu, na shuke-shuke

Tartsatsi wannan hanya na haifuwa a cikin shuka mulkin. Akwai da dama daga shuke-shuke da cewa suna da kyau karbe ta tubers, layering, cuttings, har ma da ganye da cewa za a iya amfani da su samar da sabuwar kwayoyin vegetative gabobin da iyaye shuka. Wannan irin sake yiwuwar tohowarsu, aka kira vegetative, kuma shi ne muhimmi a cikin wani sosai shirya shuke-shuke. An misali na irin wannan haifuwa za a iya daukan wannan tsaye bakin ramin abin da ya auku, misali, strawberry.

Sporulation - sake yiwuwar tohowarsu, wanda ya auku a wurare da yawa da shuke-shuke, kamar algae, ferns, mosses, fungi a kan wasu matakai na raya kasa. A wannan yanayin, da yaduwa inji na musamman Kwayoyin suna da hannu, sau da yawa ta rufe wani m harsashi, abin da na tsare su daga m effects na yanayi: zafi, sanyi, bushe. Da zaran akwai sharadi gwargwado, spores bursts da harsashi, da cell fara raba akai-akai, bada rai zuwa wani sabon jiki.

Budding ne mai Hanyar haifuwa ta hanyar iyaye a lokacin da misali da aka raba wani karamin yanki na jiki daga wanda daga baya Forms yaro jiki.

A sa mutane da suka zuriyarta daga magabata da taimakon da irin wannan haifuwa a ilmin halitta ake kira kwafi masu kunnen doki.

Sake yiwuwar tohowarsu, an yadu a yi amfani da aikin noma don samar da shuke-shuke da wani sa na halayen da suke da amfani ga rayuwar dan Adam. Long "tsaye bakin ramin", harbe yada strawberries, 'ya'yan bushes da itatuwa - cuttings. Masana kimiyya binciken sunadaran da haifuwa, don koyon yadda za ka saka idanu da kuma sarrafa su ci gaba. Cell al'adu so kwayoyin bayanai farko karbe sa'an nan kuma girma daga su da ake bukata da dukan shuka.