Leej twg pib ua lag luam melanism?

Cov txheej txheem:

Leej twg pib ua lag luam melanism?
Leej twg pib ua lag luam melanism?
Anonim

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

Kev lag luam melanism tshwm sim li cas?

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.

leej twg yog thawj tus tshaj tawm txog kev lag luam melanism nyob rau hauv peppered npauj?

Nws yog 14 xyoo tom qab Darwin tuag, xyoo 1896, JW. Tutt nthuav tawm nws raws li rooj plaub ntawm kev xaiv ntuj. Vim li no, lub tswv yim nthuav dav, thiab ntau tus neeg ntseeg Darwin txoj kev xav. Bernard Kettlewell yog thawj zaug los tshawb xyuas cov txheej txheem hloov pauv tom qab npauj hloov pauv, ntawm 1953 thiab 1956.

Dab tsi yog kev lag luam melanism hauv biology?

Kev lag luam melanism, qhov tsaus ntuj-ntawm daim tawv nqaij, plaub, lossis plaub-tau txais los ntawm cov pej xeem ntawm cov tsiaj nyob hauv thaj chaw muaj kev lag luam uas ib puag ncig yog soot-tsaus.

Thaum twg melanism nrhiav tau?

Thawj melanic phenotype (cov khoom dub zoo) tau kaw ze Manchester hauv 1848.

Pom zoo:

Nthuav cov khoom
Puas yog homomorphism tib yam li isomorphism?
Nyeem ntxiv

Puas yog homomorphism tib yam li isomorphism?

Isomorphism yog homomorphism tshwj xeeb. Greek keeb kwm "homo" thiab "morph" ua ke txhais tau tias "zoo tib yam." Muaj ob qhov xwm txheej uas homomorphisms tshwm sim: thaum ib pab pawg yog ib pawg ntawm lwm pawg;

Yuav tau sawv los yog tshwm sim?
Nyeem ntxiv

Yuav tau sawv los yog tshwm sim?

Peb hom tshwm sim yog arise, sawv, arisen. Nws yog siv hauv cov ntsiab lus tseem ceeb: Ib lub sijhawm tshwm sim thiab nws txiav txim siab los ua txoj haujlwm hauv Brussels. Ib qho teeb meem tshwm sim nrog kuv daim ntawv hla tebchaws. Koj siv arose hauv kab lus li cas?

Nyob hauv qab ceg cov leeg nqaij gastrocnemius khoov?
Nyeem ntxiv

Nyob hauv qab ceg cov leeg nqaij gastrocnemius khoov?

Cov leeg nqaij gastrocnemius flexes ko taw ntawm pob qij txha- uas yog nws ua rau taw taw ko taw nqes los ntawm khoov nws ntawm pob taws pob taws, xws li thaum koj sawv ntawm koj. cov ntiv taw. Qhov kev txiav txim no hu ua plantar flexion. Lub gastrocnemius kuj flexes ceg ntawm lub hauv caug sib koom.