reproduction yog qhov tseem ceeb rau txhua yam kab mob nyob thiab yog ib qho ntawm peb txoj haujlwm tseem ceeb uas muaj sia nyob. Yog tias tsis muaj kev yug me nyuam, txhua hom tsiaj yuav raug puas tsuaj mus rau kev tuag, txawm hais tias muaj poj niam thiab txiv neej poj niam txiv neej tsis yog ib txwm tsim nyog rau kev yug me nyuam los ua qhov chaw. Muaj ib lub tswv yim kev yug me nyuam hu ua asexual reproduction uas yog indifferent (nyob rau hauv yuav luag txhua rooj plaub) rau kev sib deev.
Nyob rau hauv tsab xov xwm no peb yuav tham txog cov tsiaj txhu thiab lawv cov piv txwv, pib nrog cov lus piav qhia ntawm lo lus "txiv neej deev txiv neej ". Tsis tas li ntawd, peb yuav qhia qee qhov piv txwv ntawm kev tsim cov kab mob sib txawv.
Kev sib deev yog ib qho ua los ntawm qee yam tsiaj thiab nroj tsuag, uas muaj ob tug neeg laus ntawm cov poj niam sib txawv. Hom tswv yim no tshwm sim thaum ib tug neeg tsim cov noob caj noob ces zoo ib yam rau lawv. Qee lub sij hawm, peb tuaj yeem hla lub sij hawm clonal reproduction, vim nws ua rau tus kheej clones ntawm niam txiv.
Ib yam li ntawd, nyob rau hauv hom kev loj hlob no, cov kab mob (qe lossis phev) tsis koom nrog, nrog rau ob qho kev zam, parthenogenesis thiab gynogenesis, uas peb yuav pom hauv qab no. Hloov chaw, lawv yog somatic cells (cov uas ua rau tag nrho cov ntaub so ntswg ntawm lub cev) los yog cov qauv ntawm lub cev.
Type of asexual reproduction and example
Muaj ntau hom thiab subtypes ntawm asexual reproduction nyob rau hauv cov tsiaj, thiab yog hais tias peb muaj xws li cov nroj tsuag thiab cov kab mob, cov npe tau ntev dua. Tom ntej no, peb qhia koj txog kev kawm ntau tshaj plaws asexual reproductive tswv yim ntawm cov tsiaj nyob rau hauv kev tshawb fawb ntiaj teb no thiab, yog li ntawd, paub zoo tshaj plaws.
1. Vegetative multiplication:
gemulation is the typical asexual reproduction of sea sponges Muaj thaum cov khoom noj khoom haus sib sau ua ke hauv ib hom cell ntawm daim txhuam cev. Cov hlwb no yog insulated nrog ib tug tiv thaiv npog tsim ib tug gemmule uas tom qab raug tshem tawm, ua rau ib tug tshiab daim txhuam cev.
Lwm hom vegetative reproduction yog buddingIb pawg ntawm cov hlwb nyob rau saum npoo ntawm tus tsiaj pib loj hlob mus rau hauv ib tug neeg tshiab uas nws thiaj li sib cais los yog nyob twj ywm thiab tsim ib tug colony. Hom kev yug me nyuam no tshwm sim hauv hydras.
NOJ NIAM YUAV UA LI CAS BORPULATIE BEWATION,IN LUB HOM PHIAJ,ZAUB NCAUJ NOJ NIAM TAU LOS RAU IB los yog ob peb daim
thiab, los ntawm txhua qhov ntawm cov khoom no ua tiav ib tus neeg tshiab. Qhov piv txwv zoo tshaj plaws tuaj yeem pom nyob rau hauv lub neej voj voog ntawm cov ntses hnub qub, vim tias thaum lawv plam caj npab, ntxiv rau qhov muaj peev xwm rov tsim tau nws, lwm tus neeg raug tsim los ntawm caj npab, clone ntawm lub hnub qub.
ob. Parthenogenesis:
Raws li peb tau hais thaum pib, parthenogenesis yuav tsum muaj qe, tab sis tsis yog phev. Cov qe uas tsis muaj menyuam tuaj yeem loj hlob mus rau tag nrho cov kabmob tshiabHom kev yug menyuam no tau piav qhia thawj zaug hauv aphids, hom kab.
3. Gynogenesis:
Gynogenesis yog lwm hom kev yug me nyuam uas tsis muaj menyuam. Ovules xav tau kev txhawb zog los tsim ib lub embryo, phev, tab sis nws tsis pub nws genome. Yog li cov xeeb ntxwv yog ib tug clone ntawm leej niam. Cov phev siv tsis tas yuav yog hom tsiaj ib yam li niam, tsuas yog hom zoo sib xws. tshwm sim hauv amphibians thiab teleosts
Ntawm no yog ib qho piv txwv ntawm kev yug me nyuam los ntawm fragmentation nyob rau hauv lub hnub qub ntses:
Tsiaj txhu tsis siv lub tswv yim kev yug me nyuam no raws li ib txwm muaj kev yug me nyuam, es tsis txhob, lawv tsuas nqa tawm thaum lub sij hawm tsis zoo, xws li kev hloov hauv ib puag ncig, huab cua txias, dej qhuav, tsis muaj txiv neej, siab. predation, etc.
Kev sib deev tsis sib haum xeeb txo qis kev hloov pauv caj ces, uas tuaj yeem ua rau ploj ntawm ib pawg neeg, pab pawg lossis cov pej xeem ntawm cov tsiaj yog tias muaj kev hloov pauv hauv ib puag ncig txuas ntxiv mus.
Tsuas muaj kev yug me nyuam
Muaj ntau yam kab mob siv cov kev yug me nyuam los ntawm kev yug me nyuam rau cov tsiaj nyob rau lub sijhawm tsis tsim nyog. Nov yog qee qhov piv txwv.
- Spongilla alba: is a type of freshwater sponge ib txwm nyob rau teb chaws Amelikas uas tuaj yeem tsim tawm los ntawm gemulation thaum kub txog -10 ºC.
- Planaria torva: belongs to the flatworm phylum or flatworms. Lawv nyob hauv dej tshiab thiab faib thoob plaws hauv Tebchaws Europe. Plays by fragmentation. Yog txiav ua ntau daim, txhua daim yuav tsim ib tus neeg tshiab.
- Ambystoma altamirani: The roob kwj salamander, zoo li tag nrho lwm cov salamanders ntawm genus Ambystoma, tuaj yeem tsim tawm los ntawm gynogenesis. Lawv yog Ameskas los ntawm Mexico.
- Ramphotyphlops braminus: Lub qhov muag tsis pom kev yog ib txwm nyob rau Asia thiab Africa, txawm hais tias nws tau qhia rau lwm lub tebchaws. Nws yog ib tug me me heev snake, tsawg dua 20 centimeters ntev thiab rov tsim dua los ntawm parthenogenesis.
- Hydra oligactis: Hydras yog ib hom dej tshiab jellyfish uas tuaj yeem tsim los ntawm budding. Lawv nyob hauv thaj chaw huab cua ntawm sab qaum teb hemisphere.
Hauv cov yeeb yaj kiab hauv qab no koj tuaj yeem pom kev rov tsim dua tom qab txiav tawm ntawm tus kab mob flatworm, tshwj xeeb yog Planaria torva:
