Video: Puas yog evolution muaj lub hom phiaj?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Xaus. Evolution piav qhia txog kev hloov pauv rau cov yam ntxwv ntawm cov kab mob nyob thoob plaws tiam neeg. Evolutionary kev hloov tsis yog coj mus rau ib lub hom phiaj , tsis yog nws tsuas yog nyob ntawm kev xaiv ntuj tsim nws txoj kev.
Ua li no, ob lub hom phiaj rau evolution yog dab tsi?
Ob loj hom phiaj ntawm evolutionary biology yog los piav txog qhov zoo kawg nkaus haum ntawm cov kab mob rau lawv ib puag ncig thiab lub hauv paus ntawm ntau haiv neeg. Txog rau qhov kawg no, peb tshawb xyuas cov noob caj noob ces thiab ecological mechanisms uas shapeadaptation nrog rau kev tsom ntsoov rau cov txheej txheem uas ua rau lub hauv paus ntawm hom.
Ib tug kuj yuav nug, puas yog kev xaiv ntuj tsim muaj lub hom phiaj? Ua ntej, natural xaiv tsis muaj zog tag nrho; nws ua tsis ua kom zoo tag nrho. Ntuj xaiv Nws yog qhov yooj yim tshwm sim ntawm kev hloov pauv, qhov sib txawv ntawm kev yug me nyuam, thiab heredity - nws tsis nco qab thiab siv tshuab. Nws muaj tsis muaj hom phiaj ; nws tsis siv zog los tsim "kev vam meej" lossis ib qho kev sib npaug.
Xav txog qhov no, lub hom phiaj ntawm evolution yog dab tsi?
Evolution yog tus txheej txheem ntawm kev hloov pauv hauv txhua yam ntawm lub neej dhau ib tiam neeg, thiab evolutionary biology yog kev tshawb fawb txog li cas evolution tshwm sim. Cov neeg muaj roj ntsha evolve los ntawm kev hloov caj ces uas sib haum rau cov kev hloov hauv cov kab mob 'observable traits.
Puas yog evolution random los yog qhia?
Kev hloov pauv yog Random Cov mechanisms ntawm evolution -zoo li naturalselection thiab genetic drift-ua hauj lwm nrog cov random variation generated los ntawm mutation. Cov xwm txheej hauv ib puag ncig yog xav tias yuav cuam tshuam tus nqi ntawm kev hloov pauv tab sis tsis yog feem ntau xav tias cuam tshuam rau kev hloov pauv.
Pom zoo:
Dab tsi yog qhov txawv ntawm daim ntawv qhia lub hom phiaj thiab daim ntawv qhia lub hom phiaj tshwj xeeb?
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Muaj pes tsawg guanine bases puas yog 50 lub hauv paus khub ob txoj hlua DNA 100 bases tag nrho muaj yog tias nws muaj 25 adenine bases?
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Hom phiaj phiaj xwm phiaj xwm yog Mercator daim ntawv qhia?
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