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School portions of skeletons and coat color. These changes provide a better individual's adaptation to the new environment. With time, the barrier separating them may disappear and groups A, B and C will communicate again. The group's return to cruzarse with group B, the same is not happening with the group C, which suffered sharp changes. With that group C shall constitute a different group from the other. Source: Cecilia Helena Vechiatto dos Santos. The formation of different groups of sparrows is based on three laws, as proposed by Troppmair (1987): Law of the size or Bergmann: in regions with very low winter temperatures, the sparrows were higher. Law of Proportions or Allen: In colder regions, the sparrows had appendages (beaks, wings and legs) lower. Gloger's Law: in hot and humid regions, such as the district of Vancouver, Canada, and on the outskirts of Mexico City, Mexico, sparrows showed up a darker. SEARCH You realized that a single species of sparrows came other in different geographical areas? Find the text arguments that identify conditions for these changes. As we have seen, Darwin explains that the struggle for survival, living beings with favorable variations, have greater success in overcoming obstacles offered by life. The beings that did not show such variations would not be adapted to particular environmental conditions and therefore would be eliminated. Is that advantage for all species? To what extent is selected is advantageous for someone? Biodiversity
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Škola dijelovi kostura i boja dlake. Te promjene pružiti bolji pojedinca prilagodbu na novu sredinu. S vremenom, ograda odvajajući ih može nestati i skupinama A, B i C će komunicirati opet. Ove skupine povratak cruzarse sa skupinom B, isto se ne događa sa skupini C, koja je pretrpjela oštre promjene. S tom skupini C će predstavljati drugu skupinu od druge. Izvor: Cecilia Helena Vechiatto dos Santos. Formiranje različitih skupina vrabaca temelji se na tri zakona, a na prijedlog Troppmair (1987): Zakon o veličini ili Bergmann: na područjima s vrlo niskim zimskim temperaturama, vrapci su veći. Zakon proporcija ili Allen: U hladnijim regijama, vrapci su privjesaka (kljunovi, krila i noge) niže. Gloger zakon: u toplim i vlažnim područjima, kao što su četvrti Vancouveru u Kanadi, a na periferiji Mexico City, Mexico, vrapci se pojavio tamniju. TRAŽI Vi shvatili da je jedna vrsta vrabaca je došao drugi u različitim zemljopisnim područjima? Nađi tekst argumente koje identificiraju uvjete za te promjene. Kao što smo vidjeli, Darwin objašnjava da je borba za opstanak, živa bića s povoljnim varijacijama, imaju veći uspjeh u prevladavanju prepreka koje se nude u životu. Bića koje nisu pokazivale takve izmjene ne bi se prilagoditi posebnim uvjetima, a time će biti eliminiran. Je li to prednost za sve vrste? U kojoj mjeri je odabrano je prednost za nekoga? Bioraznolikost