Nyob rau hauv cov noob caj noob ces, kev xaiv xaiv, lossis kev xaiv zoo yog ib hom kev xaiv ntawm ntuj tsim nyob rau hauv uas ib qho phenotypes txaus nyiam tshaj lwm cov phenotypes, ua rau cov zaus allele hloov mus rau lub sijhawm ntawm cov phenotype.
Ib qho piv txwv ntawm kev xaiv taw qhia yog dab tsi?
Ib qho piv txwv ntawm kev xaiv kev taw qhia yog fossil cov ntaub ntawv uas qhia tias qhov loj ntawm cov bears dub hauv Tebchaws Europe tau txo qis thaum lub sijhawm interglacial ntawm lub hnub nyoog dej khov, tab sis tau nce ntxiv rau txhua lub sijhawm glacial. Lwm qhov piv txwv yog lub beak loj hauv cov pej xeem ntawm finches.
txhais li cas los ntawm kev xaiv taw qhia?
Txoj kev xaiv tshwm sim thaum tus neeg muaj qhov zoo ntawm ib sab ntawm qhov txhais tau tias lawv cov pejxeem muaj sia nyob zoo dua lossis rov tsim dua dua li lwm tus.
Kev xaiv xaiv yooj yim yog dab tsi?
kev xaiv kev taw qhia: hom kev xaiv ntuj tsim uas ib qho phenotype nyiam, ua rau allele zaus hloov mus tas li nyob rau hauv ib qho kev taw qhiacuam tshuam kev xaiv: (los yog kev xaiv sib txawv) a hom kev xaiv ntuj tsim nyob rau hauv uas qhov tseem ceeb tshaj plaws rau qhov zoo yog nyiam tshaj qhov tseem ceeb nruab nrab.
Kev xaiv cov menyuam txhais lus yog dab tsi?
Kev xaiv kev taw qhia yog lub zog hauv qhov uas ua rau cov pej xeem hloov zuj zus mus rau ib qho kawg ntawm qhov zoo spectrum. … Kev xaiv kev taw qhia kuj tuaj yeem muab piv rau kev xaiv cuam tshuam, lossis kev xaiv uas ua rau muaj kev nce ntxiv hauv ob qho tib si ntawm qhov zoo tshaj plaws spectrum.
Types of Natural Selection
