Video: Dab tsi yog qhov hloov pauv hauv kev tshawb nrhiav?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A tig point yog ib qho chaw nres tsheb, ib ntus lossis mus tas li, uas yog siv los ua qhov pivot ntawm cov cuab yeej ua ntu zus. Txij li thaum a tig point yog siv los txuas lub hauv paus kev soj ntsuam , nws qhov siab yuav tsum tau ua kom zoo dua qub (tsawg kawg rau lub sijhawm nws yuav siv sij hawm txav lub ntsuas thiab saib rov qab rau nws).
Tom qab ntawd, ib tug kuj yuav nug, koj piav qhia txog qhov hloov pauv li cas?
npe. a taw tes ntawm qhov kev txiav txim siab hloov pauv; tseem ceeb taw tes ; kev kub ntxhov. a taw tes ntawm qhov twg ib yam dab tsi hloov kev coj, tshwj xeeb tshaj yog siab lossis qis taw tes ntawm ib daim duab.
Ib tug kuj yuav nug, yuav ua li cas yog ib tug tig point elevation txiav txim? Yog tias tsis muaj cov qhab nia uas paub tias tsis muaj, ib qho qhov siab yog muab rau ib qho chaw rau lub hom phiaj ntawm kev soj ntsuam cov txheeb ze qhov siab ntawm cov ntsiab lus ntawm cov cuab yeej. Qhov siab ntawm Instrument yog kev nyeem ntawv, ntxiv rau qhov paub qhov siab ntawm ib tug benchmark los yog tig point . Hloov taw tes yog ib qho chaw uas raug tua los ntawm ob txoj haujlwm sib txawv.
Tsis tas li ntawd, dab tsi yog qhov hloov pauv hauv Levelling?
Hloov Point (TP) Ib qho kev cuam tshuam taw tes nruab nrab ntawm BMs los yog TBMs raws li qhov backsight thiab foresight yog coj. Backsight (BS) Ib tug qws nyeem los ntawm "saib rov qab" ntawm a taw tes paub qhov nce xws li BM lossis TP.
Qhov kev hloov pauv txhais li cas hauv lej?
A tig point yog a taw tes nyob rau hauv uas lub derivative hloov kos npe. A tig point tej zaum yuav yog tus txheeb ze tshaj plaws lossis tus txheeb ze yam tsawg kawg nkaus (tseem hu ua qhov tsawg kawg nkaus hauv zos thiab siab tshaj). Yog tias qhov kev ua haujlwm sib txawv, ces a tig point yog nyob ruaj ruaj taw tes ; txawm li cas los tsis yog txhua yam nyob ruaj ruaj cov ntsiab lus yog cov ntsiab lus tig.
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 yog kev saib xyuas ntawm kev ruaj ntseg sab hauv txawm tias muaj kev hloov pauv hauv ib puag ncig sab nraud?
Kev saib xyuas ntawm kev ruaj ntseg sab hauv txawm tias muaj kev hloov pauv hauv ib puag ncig sab nraud yog hu ua homeostasis
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
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