Halittu effects: metamorphosis - shi ...

Tsananin magana, da metamorphosis - shi ne wani canji, da canji faruwa a sararin duniya. Wannan lokaci ne quite na kowa da ake amfani a fannoni daban daban na ilimin kimiyya. A wannan labarin, za mu duba a cikin ra'ayi daga ra'ayi na ilmin halitta. A cikin rayuwar sciences sabon abu mafi daidai da aka sani da "metamorphosis", a cikin namiji jinsi, zai ci gaba da za a yi amfani da duka biyu yiwu zabin.

Saboda haka, a cikin ilmin halitta na metamorphosis - a pronounced morphological canji na wani rai gabar, dole abin da ke faruwa a lokacin da yanayin halitta na juya. The abu ya faru a duka biyu shuke-shuke da dabbobi. A cikin 'yan metamorphosis faruwa a cikin rayuwar sake zagayowar daga mafi kwaro da kuma wasu vertabrate: cyclostomes, kifi, halittar dabba mai kafafuwa. Jigon da tsari ne maida da larval kwayoyin (dabba), ko kuma na wasu gabobin (a cikin shuke-shuke) sabõda haka da wani dadi adult kwayoyin a sakamakon da cika fuska daban-daban daga jariri tsarin, Physiology da kuma aiki.

Animal metamorphosis - shi ne ba wai kawai wata kaifi canji a cikin jiki tsari. A sabon abu ne tare da wani canji na mazauninsu da rai yanayi. M ayyuka na fara tasawa kwayoyin mabanbanta daga abin da larval saukarwa, bambanci da yake a cikin mazauninsu, amfani da abinci da kuma da yawa wasu abubuwa. Saboda haka, za mu sami muhimmanci metamorphosis a cikin yanayi, shi na samar da wani raguwa a cikin nazarin halittu gasar domin abinci, mazauninsu da kuma sauran abubuwan tsakanin kwayoyin na daban-daban da al'ummomi daga wannan nau'in.

Bari mu bincika metamorphosis a dabbobi. A mafi daukan hankali misali ne mai yiwuwa aji na kwari. Metamorphoses ga kowa da kowa 'yan wannan kungiya. A tsari ne ko dai cikakken hira ko bai cika ba. Complete metamorphosis ya shafi matakai uku na ci gaba da kwayoyin: tsutsa-kamar tsutsa, pupa (tsit lokaci, a lokacin da jiki ne gaba daya hallaka larvae da kuma kafa wani sabon jiki na balagaggun) da kuma adult kwari. Wannan irin sabon abu ne halayyar for Diptera (kwari, sauro), Hymenoptera (ƙudan zuma, bumble ƙudan zuma, wasps), Lepidoptera (malam), beetles (ladybirds). By bai cika metamorphosis, akwai kawai matakai biyu: tsutsa, kama da adult ilimin halittar jiki, da kuma, a gaskiya, da adult kwari. Bai cika hira halayyar Orthoptera (fari, fara ne kawai, mole crickets), Homoptera (aphids) da kuma Hemiptera (kwari).

Domin mafi girma shuke-shuke metamorphosis - wani gyara na wasu gabobin dangane da ayyuka da suka yi, maimakon canji na dukan kwayoyin. Matsayin mai mulkin, a kan aiwatar da shigar da tayi, maimakon kafa cikakken gabobin. shuka metamorphosis ma kira gyare-gyare. Wannan, misali, wata kwan fitila (a baka), spines (murtsunguwa), gashin baki (for inabi), rhizome (Ginger a), tubers (dankalin turawa), da kuma more. Ma'ana metamorphosis ga shuke-shuke da yake a cikin karbuwa ga muhalli da yanayi. Alal misali, spines (modified ganye) abin da ke faruwa a cikin shuke-shuke da suke zaune a zafi canjin yanayin da, da siffar iya rage danshin daga surface na takardar.