Sake bugun, kuma ci gaba da dabbobi. Materials for cikin darasi

Ko wani gogaggen masanin kimiyya dabbobi tare da cikakken yaƙĩni ba zai iya ce ba daidai da yadda da yawa jinsunan da zama na yanzu wanzu kafin a wannan duniyar tamu. Kullum bude up sabon iri, da kuma da fuska na Duniya, da rashin alheri, bace tsohon iri. Zai yiwu shi ya sa haka muhimmanci ga sani game da haifuwa da kuma ci gaban da dabbobi, don kokarin artificially hana bacewar, don kokarin fahimce karatu ya kan gab da nau'i nau'i na jinsi.

A bit a kan rarrabuwa na

Animal Mulkin yana da yawa na daban da kuma azuzuwan, ciki har da tsutsotsi, molluscs, crustaceans da echinoderms, arachnids da kuma kwari. A vertebrate ranked: kifi, halittar dabba mai kafafuwa, da abubuwa masu rarrafe, da tsuntsaye, dabbobi masu shayarwa. A iri-iri na dabbobi masu rai a duniya, suna da kyau wakilci viewports sets. Amma don haka daban-daban a cikin tsari, da dabba sõyayya a cikin wannan mulki, sãɓã wa jũna a mutunta mutane da yawa. Yadda za a yi kiwo dabbobi? Daban-daban kungiyoyin na tsari ne da za'ayi a cikin hanyoyi daban-daban. Bari mu dubi asali iri.

agamobium

Ga wasu ƙananan dabbobi (kwaro), halin da sake yiwuwar tohowarsu, kamar yadda cikin sauki hanyar haifar da kara zuriya. Animal Sake bugun, kuma Development wannan irin yana da za'ayi ta kai tsaye fission ko budding. Irin wannan dabbobi hada da tsutsotsi, Sponges, jellyfish, Amphioxus da yawa wasu. A gaskiya ma, su ne ba sai kadan. Amma da yanayin da tsarin juyin halitta don ƙirƙirar sauran, mafi lokaci-cinyewa kuma hadadden tsari na haifuwa.

syngenesis

Wannan irin bukatar biyu benaye don ƙirƙirar zuriya: namiji da mace. Sake bugun da kuma ci gaban dabbobi ne yake aikata ta spawning ko kwai calving (musamman dabbobi masu shayarwa). Alal misali, sa qwai, da kuma kwari, da kuma arachnids, kazalika da macizai da kuma tsuntsaye. Spawn: halittar dabba mai kafafuwa da kuma kifi. Amma wasu kifaye - viviparous (misali, guppies). Haihu kwiyakwiyanta, da ciyar da su madara da duk dabbobi masu shayarwa (ciki har da mutumin). A wasu jinsunan, haifuwa faruwa ba tare da sa hannu na maza. Wannan sabon abu ne da ake kira parthenogenesis. Common a kadangaru da ƙudan zuma, misali.

A ci gaba da dabba

Yana kuma na faruwa a hanyoyi daban-daban. Saboda haka a cikin kwari, misali, akwai da yawa kamar yadda matakai uku: kwai, tsutsa, pupa, adult mutum, iya sa su qwai. Kuma wasu kifi haifuwa da kuma ci gaban dabbobi da wannan nau'in na faruwa a bakin mace, inda shi Bears qwai har zuriya. Halittar dabba mai kafafuwa daga kwai tasowa wani tsaka-tsakin tsari - da tadpole na wanda riga ya kafa adult rana. Kunkuru da kuma macizai zuriyarsa samu kai tsaye daga qwai, kamar tsuntsaye. All dabbobi masu shayarwa jinsin su ne viviparous, ko da dabbobin ruwa, wanda ranked a matsayin tsoho kifi. Sun shãyar da mãma zuriyarsa tare da madara, Saboda haka sunan ajin. Maturation na ɗiyansa daga jinsuna daban na dabbobi faruwa a daban-daban lokaci, daga 'yan mintoci dubun shekaru. A mafi "m" - wanda-rana malam da sauran kwari. Sannu a hankali sosai maturing matasa tsara - a wani sosai aji na dabbobi masu shayarwa.