Thaum twg muaj kev lag luam melanism tshwm sim?

Cov txheej txheem:

Thaum twg muaj kev lag luam melanism tshwm sim?
Thaum twg muaj kev lag luam melanism tshwm sim?
Anonim

Industrial melanism yog ib qho tshwm sim uas tshwm sim thaum tib neeg nyob rau hauv ib hom tsiaj uas muaj plaub, plaub, lossis tawv nqaij, dhau los ua neeg coob coob vim lawv muaj txiaj ntsig zoo, muab cov hmoov av thiab kuab paug rau hauv thaj chaw industrialized.

Thaum twg muaj kev lag luam melanism pib?

Industrial melanism tau pom thawj zaug hauv 1900 los ntawm cov noob caj noob ces William Bateson; nws pom tias cov xim morphs tau txais los, tab sis tsis tau qhia ib qho kev piav qhia rau polymorphism.

Dab tsi yog kev lag luam melanism piv txwv?

Ntau tus tsiaj muaj lub cev xim uas tso cai rau lawv sib xyaw nrog lawv keeb kwm yav dhau. Piv txwv li no suav nrog npauj nrog tis tis uas camouflage lawv thaum so ntawm lichens. Qhov no yog hu ua Industrial melanism. …

Kev lag luam melanism yog piv txwv ntawm kev xaiv ntuj li cas?

Cov piv txwv classical ntawm kev xaiv ntuj yog muab los ntawm teb ntawm tus npauj peppered Biston betularia, uas muaj nyob hauv txhua qhov chaw hauv tebchaws Askiv. Kev lag luam melanism yog kev hloov pauv uas cov npauj nyob hauv thaj chaw muaj kev lag luam tsim cov xim melanin los nkaum lawv tus kheej ntawm lawv cov tsiaj txhu.

Kev xaiv hom twg yog kev lag luam melanism?

(b) hom kev taw qhiantawm kev xaiv yog kev lag luam melanism pom hauv npauj, Bistonbitularia.

Pom zoo: