Video: Yuav ua li cas echinoderms reproduces kev sib deev?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Feem ntau ntawm echinoderms reproduces kev sib deev , los ntawm kev tso cov phev thiab qe mus rau hauv dej kom fertilized. Indirect kev loj hlob, nyob rau hauv uas cov fertilized qe loj hlob los ntawm eggto larva mus rau cov me nyuam yaus yam tsis muaj kev txhawb nqa los ntawm niam txiv, feem ntau.
Hauv qhov no, ua li cas echinoderms reproduce?
Echinoderms yug me nyuam ob leeg sib deev thiab asexually. Kev sib deev kev yug me nyuam yuav siv qhov chaw los ntawm cov spermand qe raug tso rau hauv dej uas cov qe yog fertilized.
Tom qab ntawd, lo lus nug yog, cov hiav txwv urchins puas tsim tau kev sib deev lossis asexually? Hiav txwv Urchin Dev. Fertilization yog kev sib koom ua ke ntawm twogametes, phev thiab qe los tsim ib lub cev tshiab. Txawm tias qee cov tsiaj unicellular yug me nyuam asexually , kev sib deev yog txoj kev nyiam tshaj plaws ntawm kev nthuav tawm hauv ntau hom tsiaj txhu.
Ib yam li ntawd, tej zaum koj yuav nug hais tias, cov hnub qub hiav txwv yuav ua li cas rau kev sib deev?
Hiav txwv hnub qub ua tau tsim tawm kev sib deev tsis muaj pojniam. Hauv kev sib deev , fertilization tshwm sim hauv dej nrog txiv neej thiab poj niam tso phev thiab qe mus rau hauv ib puag ncig. Cov fertilized embryos, uas yog free-swimminganimals, ua ib feem ntawm zooplankton nyob rau hauv feem ntau hom.
Yuav ua li cas cov kab mob tuaj yeem tsim kev sib deev thiab asexually?
Asexual kev yug me nyuam yields genetic-zoo tib yam kab mob vim tus kheej tsim tawm tsis muaj lwm tus. Hauv kev sib deev kev yug me nyuam , cov khoom siv caj ces ntawm ob tus neeg los ntawm tib hom sib xyaw ua ke rau tsim noob caj noob ces - txawv cov xeeb ntxwv; qhov no ua kom muaj kev sib xyaw ntawm genepool ntawm hom.
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