Wadatacce
The 'yan amphibians Dabbobi ne masu rarrafe, a zahiri su ne kasusuwan kasusuwa na farko da suka wuce daga ruwa zuwa cikin ƙasa. Misali. toad, frog, salamander.
A baya, masu ambaliyar ruwa suna wakiltar rukunin dabbobi masu mahimmanci, duka saboda yawan nau'in da ya wanzu kuma saboda girman jikinsu. Koyaya, daga baya halittu masu rarrafe sun mamaye su ta hanyar juyin halitta, an rage wannan rukunin zuwa wasu nau'ikan.
An kiyasta Amphibians sun taso daga kifi kimanin shekaru miliyan 360 da suka gabata, kuma daga baya dabbobi masu rarrafe suka bunƙasa daga gare su, wanda hakan ya haifar da dabbobi masu shayarwa da tsuntsaye na yau.
Misalai na amphibians
- Toad na kowa
- Giwa babba
- Salamander
- Triton
- Kwadi mai guba
- New Zealand kwado
- Seychelles kwado
- Titin kwaro
- Blue arrow kwai
- Axolotl ko kololote (salamander na Mexico)
- Cecilia
- Pygmy salamander flatfoot
- Karya newt jalapa
Halayen Amphibian
Amphibians suna da bare fata, numfasawa ta gills kuma ba su da kafafu tun suna ƙanana; lokacin da suka manyanta suna numfashi ta huhu kuma suna da ƙafafu huɗu tare da murfin mahaifa.
Bugu da kari, suna fuskantar metamorphosis, wato, suna bi ta matakai daban -daban na rayuwa, galibi uku:
- Cewa na kwai
- The tsutsa (na numfashi gill)
- The babba (na huhu numfashi).
A zahiri, su ne kawai kasusuwan kasusuwan da ke shan metamorphosis.
Wasu fasali:
- Manyan dabbobi masu rarrafe na iya rayuwa cikin ruwa ko a ƙasa (rayayyun halittu), tsutsa na iya rayuwa cikin ruwa kawai.
- Amphibians suna numfasawa ta cikin fata (bugun numfashi), don kiyaye fata da danshi kuma su hana bushewa, suna da gland wanda suke ɓoye gamsai.
- Dabbobi ne na hadi na waje ko na ciki da oviparous.
- Ba su da gashi ko sikeli.
- Suna cin kwari, tsutsotsi, slugs, da gizo -gizo; kuma kayan lambu ko ƙananan dabbobi masu shayarwa, da kifi da tsutsa.
- Lokacin da zafin jiki na waje ya yi ƙasa kaɗan, sukan kasance ba sa aiki, kuma galibi suna tsira da godiya ga ajiyar kitsen da suka tara a jikinsu.
- Waɗannan su ne dabbobin da ke cin abincinsu ba tare da sun rushe shi a baya ba.
- Suna da sifa mai siffa, cloaca, wacce ke aiki azaman hanyar fita kawai tare da aikin fitsari da haihuwa.
Rarraba
Akwai umarni uku ko azuzuwan amphibians:
- Gymnophiona ko apodes (ba tare da gabobi ba)
- Caudata ko caudates (tare da wutsiya)
- Anura ko anurans (kwaɗi da toads).
An kiyasta cewa akwai wasu 4,300 nau'in amphibians wanda ke rayuwa a yau, amma ta hanyar ƙungiya ce mai ilimin halitta wanda yawanta ya kasance yana raguwa sosai na ɗan lokaci zuwa wannan ɓangaren, galibi saboda canjin mazauninsu na halitta da canjin yanayi.
