Zvemukati
Zvichienderana nenzira yavanobereka nayo, pane mapoka makuru maviri emhuka: iyo viviparous uye oviparous:
- Viviparous: Mwana anokura muhurongwa hwekubereka hwemukadzi pane imwe nguva uye anozoberekwa kuburikidza nemukadzi. Mammalian mhuka (kusanganisira vanhu) zvinowira muchikamu ichi, kunyangwe paine zvisaririra. Semuenzaniso. tsuro, imbwa, kangaroo.
- Oviparous: Iwo madiki anoumbwa nekukudziridzwa mukati mezai, iro rakambosanganisirwa nemurume werudzi ndokuiswa nemukadzi. Semuenzaniso. datya, Nyuchi, chikwambo.
Chii chakaita oviparous?
Kana iri mhuka inoputika, kusangana kunoitika mukati kana kunze kwemuviri wemukadzi. Kukura kwevechidiki, saka, kunoitika kunze kwemuviri waamai. Oviparity hunhu hweshiri, hove, uye amphibian. Zvimwe zvinokambaira, zvakaita sehuku uye nyoka, uye zvipembenene zvakawanda zvakare zvine oviparous.
Zvekuti hatchling inokura mukati meza inoonekwa se shanduko yekushanduka iyo inokomberedza kusimudzira mwero wekupona, sezvo chimiro chezai chichi dzivirira "embryo" uye chinodzivirira desiccation, iyo inogona kuve yakakosha munzvimbo dzinodziya.
Iko kune yakasanganiswa chikamu, iri iyo ye oovigiparous. Muchiitiko ichi, mazai anoramba ari mukati memuviri wechikadzi kusvikira iyo nhumbu yakwana. Dzimwe shark uye dzakasiyana siyana mhuka dzisina nyama dzinoumba chikamu ichi.
- Onawo: Chii chinonzi viviparous mhuka?
Iyo oviparous uye kuchengetwa kwemazai avo
Haisi mhuka dzese dzinobata mazai avo nenzira imwechete. Vanenge vese vanovaisa mumatendere. Nepo shiri dzichiwanzo kuvaka matendere adzo mumiti kana muvhu, umo dzavanochochonya, dzimwe mhuka, senge hamba, dzinoviga mazai avo mujecha.
Iyo hove uye iyo amphibians, iye, dzinokandira mazai adzo mumvura. Penguin zvakare inokandira mazai. Aya mazai anowanzo kufukidzwa neiyo gelatinous layer inodzivirira.
Ivo vanowanzo shanduka uye vachikurudzira nekukasira, kubva pane izvo zvinonzi fry zvinobuda, izvo zvinodya pane yolk sac yezai.
- Onawo: Chii chinonzi amphibian mhuka?
Mienzaniso yeoviparous
| Garwe | Svosve |
| Penguin | Shiri duku |
| Huku | Parrot |
| Condor | Gondo |
| Mhou | Shuramurove |
| Dhadha | Goose |
| Rattlesnake | Zvihuta |
| Datya | Macaw |
| Hornero | Salmoni |
| Nyuchi | njiva |
Zvimwe zvinyorwa muchikamu:
- Mhuka dzinodya
- Mhuka dzinokanganisa
- Viviparous Mhuka
- Mhuka dzinopenya
