Kunanga kukura runozivisa ... zvisina kunanga Postembryonic Development: Mienzaniso

Development kunokosha chinhu muupenyu. Kuchitanga zai uye rinopera pakuyaruka. For post-embryo nguva kunoratidzwa ne zvakananga uye zvisina kunanga kukura. Direct kukura - ndiro chaivo neurongwa zvipuka zvine masero akawanda inokura uye kunowedzera, complicating sangano ravo. Fani iyi ndizvo kuti munhu, hove, shiri, mhuka.

Kunanga budiriro - imwe nzira iyo embryo mugomba vakura nomumwe kubatanidzwa larval pachikuva, akaperekedza metamorphosis. Izvi zvinoitika, Somuenzaniso, invertebrates akawanda uye amphibians.

Kunyanya post-embryo nguva

Nguva post-embryo kukura achiperekedzwa kuchinja morphological unhu, miitiro uye nzvimbo. Kutungamirira kukura maitiro chinhu ndechokuti azvarwa embryo ndiwo vakasiyana kopi mukuru, zvakasiyana chete kukura uye pasina zvimwe unhu izvo vawana chete nguva. Muenzaniso aizova kukura murume, mhuka uye dzimwe nezvinokambaira. Kunanga kukura Ndiwo invertebrates, mollusks uye amphibians. Panyaya iyi, fetus ane Misiyano zvichienzaniswa mhuka vakura. Sezvo muenzaniso yakakodzera zvavo shavishavi. Chete pashure pacho zvichazadziswa mumatanho wandei kukura, duku dukutu pachishandurwa kupfuura kukudzwa.

nguva budiriro

Nguva post-embryo kukura zvinosanganisira yokupara pachikuva, kukura uye kuchembera.

• Juvenile nguva anofukidza nguva kubva pakuzvarwa kusvikira pakuyaruka. danho ichi chinotevererwa nechinoteverwa ane kuchinjira kumamiriro matsva ezvinhu. Zvinokosha kucherechedza kuti mhuka dzakawanda uye nezvinokambaira, iyo nokuda zvakananga nzira post-embryo kukura inozivikanwa, yakatanga zvakafanana. Musiyano ndiyo chete nguva puranga. Kugumisa nguva pakuyaruka.

• kukura inonzi dzokubereka pachikuva, dzinoratidzwa zvokurega kukura. Mumuviri pane kuzvipira kuvandudzwa zvimwe zvivako zvavo zvishoma nezvishoma kudzikira.
• Nguva deceleration zvichiteverwa rutapudzo pezvakaitwa vakwegura. Kazhinji, kuti vasanyanye uremu muviri vakacherechedza. Kana hakuna kumbova nesimba kupindira, yepanyama rufu kunoitika apo hurongwa hunokosha somugumisiro kuderera pezvakaitwa zvose vanoguma ushande.

Kunanga budiriro: mienzaniso uye nzendo

Ngatitarisei kuti upenyu ichibudira mune chitsva. Direct uye kunanga kukura - shoko achirondedzera siyana urongwa mhuka tsvina, izvo chinotanga nembeu zai. Panguva post-embryo kukura vari pakupedzisira kuumbwa nenhengo dzawo, pane kukura, kurara kuibvisa , anoteverwa rakazotevera kuti siyana. Next ndiko kuchembera, uye pasina nechitarisiko kupindira kunobva dzinongoitika rufu.

• Pakarepo pashure pokuberekwa unotanga yaitevedzana transformations. Panguva ino zvishoma rakasiyana muviri vakura zvose externally uye nechomukati.
• Danho rechipiri - kushandurwa kuva muviri zvachose itsva. Metamorphosis - a postembryonic kuchinja muviri chimiro pamwe rakatumbuka nzendo dzakawanda.
• Danho rechitatu - wokupedzisira pachikuva, iyo rinopera pakuyaruka uye kuberekana.

Zvinoitwa zvisina kunanga

Kunanga kukura runozivisa zvipuka zvine masero akawanda zvipenyu. Of ichinonoka zai dukutu, izvo nechomukati uye externally haana kufanana munhu mukuru. Maererano sechivako zvikuru nyore fuma, kazhinji kuva chisarudzo duku. chitarisiko chavo, zvinogona ari kure akafanana madzitateguru avo kure. Muenzaniso aizova dukutu amphibian akadai datya.

Externally, kuti tadpole kwazvo nowenyika hove duku. Nokuda inokosha larval zvomukati, anogona kurarama upenyu hwakasiyana zvachose pane specimens vakura. Kunyange wokugaya pabonde akasiyana vasina, saka hafu mazana haagoni kungoonekwa. Mune imwe nhamba kwazvakaita, Danho iri kukura anopindura chikamu chikuru hwavo.

The yakakura metamorphosis

Mugore zvisina kunanga kukura achangoberekwa mhuka zvakasiyana chaizvo kubva vakura chimiro zvinoverengeka anatomical zvinhu. Mudumbu tsotsonya kubva mazai ari mazana muchimiro iyo kaviri metamorphosis kukuru kusati runosvika mukuru rwakazara. Kunanga kukura runozivisa mhuka mazai akawanda. Ava vamwe echinoderms, amphibians nezvipembenene (kungozvifunga, dragonflies, matatya zvichingodaro). The mazana zvisikwa izvi kazhinji akasiyana zvachose zvipenyu nezvakazvipoteredza nzvimbo kupfuura mhuka vakura. Vakaguta, kukura uye pane imwe nguva kushandurwa kuva mhuka vakura. Izvi pose metamorphosis pamwe vasiri kuchinja dzakawanda.

Zvayakanakira nezvayakaipira zvakananga budiriro

Plus yakananga budiriro ndechokuti kukura inoda ndoda simba uye zvinhu zvinokosha, sezvo pasina rearrangement yose hariwaniki mumuviri. The marapirwo ndechokuti kukura embryo inoda guru matura zvinovaka muviri ari mazai kana zvisaririra mudumbu.

The akaipa chinotaurwa ndechokuti pakati vechiduku uye vakura mhuka zvingava makwikwi mukati rudzi sezvo nzvimbo dzavo uye zvinyorwa zvokudya chete.

Zvayakanakira nezvayakaipira kuti zvisina kunanga

Nokuti kuti zvinenge zviri kunanga mhando kurarama dzakasiyana zvipenyu niches, makwikwi pakati mazana uye vakuru kazhinji regai kuitika. Kunakisa ndiyewo ndechokuti mazana rezvisikwa ndakagara kubatsira kuwedzera nzvimbo mupfungwa inogara. Pakati zvazvakaipira zvinokosha zvakanyatsonanga kuti zvisina kunanga kukura mhuka kupinda mukuru kazhinji inogara kwenguva refu kwenguva. For Qualitative transformations vanoda yakawanda zvinovaka muviri uye simba.

Mhando zvisina kunanga

Zvinotevera mhando kunanga kukura: izere uye kukwana metamorphosis. Kutanga azere kunanga kutendeuka hunhu rezvipembenene (moths, zvipembenene, vamwe Hymenoptera). Vakarangana mazana kutanga kudya chiedza, kukura uye tava wakasimba cocoons. In mamiriro ichi, vose nhengo dzomuviri kuputsa, uye zvichizoita cellular zvinhu uye vaunganidza zvinovaka muviri ndiwo hwaro paumbwe zvakasiyana zvachose miviri, hunhu vakuru muviri.

Mienzaniso metamorphosis zvisina kunanga postembryonic kukura tsika kuti marudzi ose ehove uye amphibians, dzimwe mhando nehonye, mollusks nezvipembenene. Musiyano mukuru kubva kwakakwana kutendeuka ndiwo pasina nhumbana pechikuva.

The chaivo basa larval Danho

The larval Danho - nguva basa kukura uye inotonhorera chekuchengeta. Chitarisiko Kazhinji zvakasiyana chaizvo kubva mukuru chimiro. Vane yakasiyana hurongwa zvavo uye miviri, izvo havana yakura vanhu. Zvokudya zvavo hungasiyanawo. Mazana zvinowanzotaurwa kujairana zvakatipoteredza. Somuenzaniso, tadpoles kurarama zvinenge bedzi mumvura, asi anogona kurarama panyika, sezvo mukuru datya. Dzimwe dziri akura pachikuva vari wakaiswa, apo avo mazana chichifamba uye kushandisa simba iri kuti kutamira uye kuwedzera dzinogarisana nharaunda.