Qhov sib txawv ntawm kev sib deev thiab kev yug menyuam yog kev sib deev muaj ob niam txiv ntawm kev sib deev thaum kev sib deev nrog ib leeg niam txiv.
Lub peev xwm los tsim thiab tsim ib tiam tshiab ntawm tib hom yog ib qho ntawm cov yam ntxwv tseem ceeb ntawm cov kab mob muaj sia. Nws cuam tshuam txog kev sib kis ntawm cov khoom siv caj ces los ntawm niam txiv tiam mus rau tiam neeg, ua kom cov yam ntxwv ntawm hom thiab perpetuating tus yam ntxwv ntawm niam txiv kab mob. Ua ntej tus neeg tshiab mus txog nws tus kheej lub sijhawm yug me nyuam, nws ib txwm yuav tsum mus dhau lub sijhawm ntawm kev loj hlob thiab kev loj hlob. Qee cov tswv cuab ntawm hom yuav tuag ua ntej lawv mus txog hnub nyoog yug me nyuam vim yog kev tua tsiaj, kab mob thiab kev tuag tsis zoo. Yog li cov tsiaj uas tseem tshuav yuav tsuas tsim tau cov xeeb ntxwv ntau dua thiab pab txhawb rau kev txuas ntxiv ntawm hom. Muaj ob hom kev luam tawm; xws li, asexual and sexual reproduction.
Kev sib deev yog dab tsi?
Kev sib deev yog ib hom kev yug me nyuam uas muaj ob hom niam txiv thiab kev sib txuas ntawm cov khoom siv caj ces ntawm txhua tus niam txiv. Cov niam txiv tsim gametes, thiab gametes fuse nrog ib leeg thaum muaj kev sib deev. Raws li qhov tshwm sim ntawm syngamy, lub cell diploid hu ua zygote cov ntaub ntawv thaum kawg ntawm kev sib deev. Raws li hom gametes fusing nrog ib leeg, muaj ob hom kev sib deev; uas yog, isogamy thiab heterogamy. Isogamy yog kev sib koom ua ke ntawm cov qauv zoo sib xws ntawm lub cev sib txawv gametes. Nws pom tsuas yog hauv cov ntawv qis xws li Protozoa. Heterogamy yog fusion ntawm ob hom sib txawv ntawm gametes, txawv li ovum thiab phev.
Daim duab 01: Kev Sib Deev Kev Sib Deev
Fertilization yog qhov xwm txheej tseem ceeb ntawm kev sib deev. Txawm li cas los xij, muaj qee qhov xwm txheej tshwm sim ua ntej thiab tom qab fertilization. Cov txheej xwm ua ntej fertilization muaj xws li gametogenesis thiab gamete hloov thaum lub sijhawm tom qab fertilization muaj xws li tsim zygote thiab embryo.
Thaum sib piv kev sib deev thiab kev sib deev, kev sib deev ua rau muaj kev sib txawv ntawm cov xeeb ntxwv. Kev sib txawv ntawm caj ces yog qhov tseem ceeb vim nws muab cov khoom siv rau kev xaiv ntuj. Tsis tas li ntawd, kev sib txawv ntawm caj ces yog tus yuam sij rau evolution. Raws li qhov tshwm sim ntawm recombination ntawm DNA thaum lub sij hawm gamete tsim los ntawm meiosis, genetic sib txawv gametes raug tsim. Cov gametes no tsim cov caj ces sib txawv ntawm cov xeeb ntxwv.
Yuav ua li cas yog kev sib deev?
Kev sib deev yog ib qho ntawm ob hom kev yug me nyuam. Nws tsuas muaj ib tug niam txiv xwb. Yog li ntawd, cov xeeb leej xeeb ntxwv yog caj ces zoo ib yam nrog niam txiv. Prokaryotes xws li cov kab mob thiab cov kab mob unicellular eukaryotic xws li Amoeba thiab Paramoecium reproduce asexually los ntawm cell division los yog binary fission ntawm niam txiv cell.
Daim duab 02: Binary Fission
Yog li no, kev yug menyuam tsis muaj menyuam yog ib hom kev yug me nyuam ua los ntawm ib yam kabmob uas tsis muaj gametes. Nws feem ntau tshwm sim hauv kev tsim cov xeeb ntxwv zoo ib yam, tsuas yog kev hloov pauv caj ces tshwm sim los ntawm kev hloov pauv tsis sib xws ntawm cov tib neeg. Muaj peb hom kev sib txuas ntawm asexual reproduction: fission, budding thiab fragmentation nyob rau hauv cov tsiaj. Cov tsiaj qis qis xws li prokaryotes, eukaryotes, cnidarians thiab Platyhelminthes siv hom kev yug me nyuam.
Dab tsi zoo sib xws ntawm kev sib deev thiab kev sib deev sib deev?
- Txoj kev sib deev thiab kev sib deev yog hom kev nthuav tawm ntawm cov tiam tam sim no mus rau yav tom ntej.
- Kuj, ob qho tib si kev sib deev thiab kev sib deev ua rau muaj lub cev tshiab.
- Cov kab mob muaj sia siv cov txheej txheem no.
Qhov txawv ntawm Kev Sib Deev thiab Kev Sib Haum Xeeb yog dab tsi?
Kev sib deev thiab kev sib deev yog ob hom kev yug me nyuam uas pom los ntawm cov kab mob nyob. Qhov sib txawv tseem ceeb ntawm kev sib deev thiab kev yug me nyuam ntawm asexual yog tias kev sib deev kev sib deev tshwm sim ntawm ob niam txiv thaum yug me nyuam asexual tshwm sim los ntawm ib leej niam leej txiv. Asexual reproduction yuav tsum tsuas yog ib tug divisible cell los tsim ib tug tshiab kab mob, whereas kev sib deev reproduction yuav tsum tau ob gametes, lawv tsim thiab fusion. Li no, qhov no kuj yog qhov sib txawv ntawm kev sib deev thiab kev yug me nyuam asexual. Ntxiv mus, qhov sib txawv ntxiv ntawm kev sib deev thiab kev sib deev yog tias kev sib deev yuav tsum tau tsim cov kab mob sib deev, tab sis asexual reproduction feem ntau tshwm sim tsis muaj lawv.
Dhau li ntawm, gamete ntau lawm tshwm sim los ntawm meiosis hauv kev sib deev. Thaum lub sij hawm meiosis, genetic recombination yog ib qho txheej txheem. Yog li, gametes qhia txog kev hloov pauv caj ces, thiab nws ua rau muaj kev sib txawv ntawm cov xeeb ntxwv hauv kev sib deev. Txawm li cas los xij, asexual reproduction tsis cuam tshuam nrog meiosis lossis genetic recombination. Yog li ntawd, kev hloov pauv caj ces yog tsawg heev hauv kev yug me nyuam asexual. Yog li ntawd, qhov no kuj yog qhov sib txawv tseem ceeb ntawm kev sib deev thiab kev yug me nyuam.
Nyob hauv qab no yog ib qho infographic qhia qhov txawv ntawm kev sib deev thiab kev yug menyuam.
Summary – Kev sib deev vs Asexual Reproduction
Kev sib deev yog ib txoj kev ntawm kev yug me nyuam uas ua ke ntawm cov khoom siv caj ces ntawm ob tus neeg siv qhov chaw thiaj li tsim tau cov xeeb ntxwv. Ntawm qhov tod tes, asexual reproduction yog hom thib ob ntawm kev yug me nyuam nyob rau hauv uas tsis muaj caj ces recombination tshwm sim, los yog tsis muaj fertilization tshwm sim. Yog li ntawd, ob tug niam txiv koom nrog kev sib deev kev sib deev thaum tsuas yog ib leej niam leej txiv koom nrog kev yug me nyuam asexual. Kev sib deev kev sib deev ua rau muaj kev sib txawv ntawm cov xeeb ntxwv thaum yug me nyuam asexual tsim cov xeeb ntxwv zoo ib yam. Yog li, qhov no qhia txog qhov sib txawv ntawm kev sib deev thiab kev yug menyuam.
