A bambanci ga abin da hadi pollination: siffofin da kuma halayyar fasali na matakai

Pollination da kuma hadi ne mafi muhimmanci matakai cewa samar da generative haifuwa iri shuke-shuke. Abin da hadi Ba kamar pollination za a tattauna a takaice a wannan labarin. Rawar da suka taka a cikin yanayi yana da muhimmanci sosai. Saboda haka, godiya ga su duka ka fi so 'ya'yan itatuwa suna kafa. Don haka bari mu magance tare.

Mene ne bambanci na hadi kan pollination ilmin halitta zai amsa

Dukansu wadannan matakai faruwa ne kawai a wakilan sassan na gymnosperms da angiosperms. Don yin wannan, suna da musamman gabobin na jima'i haifuwa. A gymnosperms, mafi yawan abin da su conifers, kamar yadda su ne namiji da mace Cones. Ba su samar da furanni, sabanin angiosperms, wanda ya zauna a rinjaye matsayi a duniya. Babban sassa na furanni ne stamen da pistil samar da generative haifuwa tsari. Abin da hadi Ba kamar pollination? Don amsa wannan tambaya, bari mu fara duba da yanayin da wadannan matakai.

Mene ne pollination

Pollination a flowering shuke-shuke ne tsari na canja wurin pollen daga anther da stigma na pistil stamens. Me wannan tsari wajibi ne a tabbatar da cewa akwai wani ci daga gametes? Duk da al'amarin a cikin tsarin da flower. Ɗa namiji Kwayoyin na mafi girma shuke-shuke , an kira maniyyi. Suna gyarawa, suna da yawa, kuma suna located a cikin anther stamens a haɗe zuwa thread. Mace gamete kira wani kwai. Yana da yake a cikin mufuradi ne located a cikin ƙananan ɓangare na mika pestle - kwai. Abin da hadi Ba kamar pollination? A karo na biyu idan, namiji da mace gametes ba alaka. Pollination ya shafi canja wuri na maniyyi a saman pistil, inda za su fara da hanyar da kwai. Yana iya faruwa a hanyoyi da dama.

iri pollination

Don amsa wannan tambaya na abin da yake da bambanci da hadi da dusting, shi wajibi ne don la'akari da iri. Akwai manyan hanyoyi biyu. Wannan abu ne na halitta da kuma wucin gadi pollination. A farko ya shafi canja wuri na pollen da iska, da ruwa, ko da wakilan da dabba mulkin. An yi imani da cewa pollination kayan kawai kwari: ƙudan zuma, wasps, bumblebees, malam da sauransu. Amma wannan tsari yana tafiya ne da kadan tsuntsaye - sunbirds da jemagu, da kuma kananan dabbobi, kamar couscous. Entomophilous shuke-shuke da manyan furanni tare da haske launin corolla da ido dandano. Wani lokaci su suna shiga a cikin Inflorescence to mafi jawo hankalin. Su ne da wuya a rasa. Wind-pollinated shuke-shuke suna da yaushe kananan da kuma inconspicuous. Artificial hanyar da mutum daukawa fitar domin ya sami 'ya'yan itatuwa na kaka.

Mene ne hadi

Hadi - shi ne aiwatar da tattara abubuwa masu kyau na jima'i Kwayoyin. Abin da hadi Ba kamar pollination? Da farko, na farko aiwatar da sakamakon ne ba zai yiwu ba tare da na biyu. A lokacin pollination, maniyyi ne a kan stigma. Amma domin isa da kwai, dole ne ka jam tube ci gaba. Ya ke tsiro, kuma tare da shi, motsi zuwa ga manufa da kuma maniyyi.

Features biyu hadi da flowering shuke-shuke

A ovaries ne biyu pistil Kwayoyin. Wannan ne kwai da kuma tsakiyar jam. Saboda haka, a tsari na hadi da hannu biyu namiji jam sel. Hadakar da kwai da maniyyi farko nan gaba shuka tayi kafa. Ya ƙunshi dukan zama dole sassa: tushen, toho, leaf, zangarniya. A na biyu sakamakon maniyyi hadi tsakiyar jam cell ne endosperm. Wannan ajiye gina jiki. Endosperm tare da jam samar da wata iri, wanda yake a cikin flowering shuke-shuke a cikin 'ya'yan, da kuma a gymnosperms - bude a kan Sikeli Cones. Ga abin da ke bambanci pollination hadi. Wannan shi ne sakamakon. A lokacin pollination, hadi faruwa. Gametes ba da alaka, hana su inji motsi. Pollination ko da yaushe ya auku farko da kuma bukatar da baki na waje sojojin: dabbobi, iska, ruwa, kwari. A sakamakon hadi ne tsaba da 'ya'yan itatuwa. Yana faruwa ba tare da waje tsangwama.

Wannan ne bambanci tsakanin pollination hadi. Wannan jerin matakai da cewa underlie jima'i haifuwa da kuma iri shuke-shuke.