Video: Kev hloov pauv dej siv rau dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Daim ntawv thov ntawm hloov chaw
Txoj kev no tuaj yeem ua tau siv ntsuas qhov ntim ntawm ib qho khoom siv, txawm tias nws daim ntawv tsis tu ncua. Muaj ntau txoj hauv kev ntawm kev ntsuas zoo li no. Nyob rau hauv ib rooj plaub, qhov nce ntawm cov kua theem yog sau npe raws li cov khoom yog immersed nyob rau hauv cov kua (feem ntau dej ).
Ntawm no, dab tsi yog lub ntsiab lus ntawm kev hloov dej?
Kev khiav dej num yog ib qho tshwj xeeb ntawm cov kua dej hloov chaw , uas yog lub hauv paus ntsiab lus uas txhua yam khoom muab tso rau hauv cov kua dej ua rau cov kua dej tsis nyob hauv qhov ntim ntawm qhov chaw. Yog tias tag nrho qhov ntom ntawm cov khoom yog ntau dua dej , nws sink.
Kuj Paub, yuav siv dej hloov pauv li cas los ntsuas qhov hnyav? Thaum koj paub qhov ntim ntawm lub dej ntws tawm , koj tuaj yeem tam sim ntawd txiav txim nws hnyav los ntawm kev sib npaug ntawm qhov ntom ntawm dej ntawm qhov kub thiab txias. Qhov ntawd yog vim lub ntsiab lus ntawm qhov ntom (d) yog qhov loj (m) faib los ntawm ntim (v), yog li m = dv.
Tsis tas li ntawd, vim li cas qhov kev hloov pauv dej yog qhov tseeb?
Cov ntim ntawm ib qho khoom tseem tuaj yeem txiav txim siab los ntawm hloov chaw . Ib qho khoom uas tuab dua dej yuav tog thiab tshem tawm ib ntim ntawm kua sib npaug rau cov ntim ntawm cov khoom khoom. Piv txwv li, yog tias ib yam khoom muaj qhov ntom ntawm 1.23 g / mL thiab koj ntsuas nws qhov ceev yog 1.24 g / mL, ces koj tau raug.
Puas yog lub nkoj xa khoom zoo ib yam li qhov hnyav?
Kev khiav tawm yog qhov ntim ntawm cov dej hloov chaw thaum lub nkoj yog dawb do floating thiab xws li ntim yuav sib npaug rau tag nrho hnyav ntawm lub nkoj thiab tag nrho cov khoom muaj nyob rau lub sijhawm ntawd. Nws yog ib qho kev sib raug zoo rau overal hnyav.
Pom zoo:
Dab tsi yog qhov kev hloov pauv hloov pauv?
Kev hloov pauv, hauv molecular biology, yog hais txog kev hloov pauv hauv deoxyribonucleic acid (DNA), qhov twg ib qho (ob lub nplhaib) purine hloov pauv rau (ib lub nplhaib) pyrimidine, los yog vice versa
Dab tsi yog qhov txawv ntawm ib puag ncig kev hloov pauv thiab kev hloov pauv qub txeeg qub teg?
Qhov sib txawv ntawm cov yam ntxwv ntawm cov tib neeg ntawm tib hom yog hu ua variation. Qhov no yog inherited variation. Qee qhov kev hloov pauv yog qhov tshwm sim ntawm qhov sib txawv ntawm ib puag ncig, lossis ib tus neeg ua dab tsi. Qhov no yog hu ua environmental variation
Dab tsi tsim cov roj siab thiab nws hloov pauv li cas nrog kev hloov pauv hauv kinetic zog?
Gas siab yog tshwm sim los ntawm kev sib tsoo ntawm cov khoom siv roj nrog rau sab hauv ntawm lub thawv thaum lawv sib tsoo nrog thiab tawm dag zog rau ntawm phab ntsa ntim. Tom qab ntawd cov roj yog cua sov. Raws li qhov kub ntawm cov roj nce, cov khoom tau nce lub zog kinetic thiab lawv cov nrawm nrawm
Thaum ib qho kev sib cais ua rau muaj kev hloov pauv hloov pauv ntawm lub ntiaj teb nce ntxiv?
Txij li thaum lub kaw lus raug cais tawm, tsis muaj cua sov tuaj yeem khiav tawm (tus txheej txheem yog li adiabatic), yog li thaum lub zog ntws tawm hauv lub cev, qhov entropy ntawm qhov system nce, piv txwv li Δ Ssys> 0. Yog li ntawd, lub entropy ntawm lub system yuav tsum tau nce rau ib tug spontaneous txheej txheem nyob rau hauv no cais system
Peb qhov laj thawj tseem ceeb ntawm kev hloov pauv hloov pauv yog dab tsi?
Allele frequencies nyob rau hauv ib tug pej xeem yuav hloov vim plaub lub hauv paus zog ntawm evolution: Natural Selection, Genetic Drift, Mutations thiab Gene Flow. Kev hloov pauv yog qhov kawg ntawm cov alleles tshiab hauv cov noob caj noob ces. Ob ntawm cov txheej txheem tseem ceeb tshaj plaws ntawm kev hloov pauv hloov pauv yog: Natural Selection thiab Genetic Drift