Cov txheej txheem:
Video: Dab tsi yog qhov laj thawj tseem ceeb ntawm lub dab dej?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov feem ntau ua rau lub dab dej yog cov kev hloov hauv cov dej hauv av los yog kev nce siab ntawm cov dej saum npoo av. Ib tug natural sinkhole Feem ntau tshwm sim thaum acidic rainwater nkag mus rau hauv cov av saum npoo av thiab sediment kom txog rau thaum nws mus txog rau ib tug soluble bedrock xws li ntsev, limestone los yog sandstone.
Tsis tas li lo lus nug yog, ua li cas lub sinkhole tsim?
Raws li cov limestone dissolves, pores thiab kab nrib pleb yog loj thiab nqa cov dej acidic ntau dua. Sinkholes yog tsim thaum cov av saum npoo av ntog los yog tog rau hauv cov kab noj hniav los yog thaum cov khoom nto yog nqa mus rau hauv cov voids.
Tom qab ntawd, lo lus nug yog, yog vim li cas cov sinkholes txaus ntshai? Cov xuab zeb lim mus rau hauv qhov qhib hauv pob zeb, maj mam ua rau cov av ntog. Kev yaig txuas ntxiv ua rau qhov loj ntawm kev nyuaj siab. Zoo li kev tawg sinkholes , cover-kev sinkholes tshwm sim maj mam. Feem ntau txaus ntshai hom ntawm sinkhole yog cover-collapse sinkhole.
Tsis tas li ntawd, cov cim ceeb toom ntawm lub dab dej yog dab tsi?
Nov yog 7 cov cim qhia pom tias lub dab dej tuaj yeem tshwm sim:
- Ib puag ncig kev nyuaj siab nyob rau hauv lub ntiaj teb:
- Localized subsidence los yog kev nyuaj siab nyob qhov twg ntawm cov cuab yeej:
- Lub pas dej ncig (los yog lub pas dej loj, tob):
- Lub hauv paus ntsiab lus:
- Kev tawg ntawm txoj kev lossis pavement:
- Tam sim ntawd poob ntawm qhov dej theem ntawm qhov chaw:
Tib neeg puas tuaj yeem ua rau lub dab dej?
Tib neeg kev ua si ua tau tsim sinkholes Ib yam nkaus thiab, piv txwv li, los ntawm kev sib tsoo lossis tawg cov kav dej thiab cov kav dej lossis cov kav dej tawg, cov av tsis zoo tom qab kev khawb av, thiab faus cov thoob khib nyiab, cav thiab lwm yam khib nyiab. Lawv ua tau kuj tshwm sim los ntawm overpumping thiab extraction ntawm cov dej hauv av thiab subsurface kua.
Pom zoo:
Dab tsi yog qhov laj thawj tseem ceeb uas koj tuaj yeem hnov lub suab nrov nyob deb ntawm dej thaum hmo ntuj?
Qhov kub thiab txias inversion yog vim li cas vim li cas lub suab tuaj yeem hnov ntau dua qhov kev ncua deb ntawm hmo ntuj tshaj li thaum nruab hnub - ib qho cuam tshuam feem ntau tsis raug rau kev puas siab puas ntsws tshwm sim thaum hmo ntuj nyob ntsiag to
Dab tsi yog qhov laj thawj tseem ceeb ntawm speciation?
Cov kws tshawb fawb xav tias qhov kev sib cais ntawm thaj chaw yog ib txoj hauv kev rau cov txheej txheem ntawm speciation pib: cov dej hloov pauv, cov roob nce siab, cov teb chaws drift, cov kab mob txav mus los, thiab dab tsi yog ib zaug cov pej xeem tsis tu ncua tau muab faib ua ob lossis ntau dua cov neeg me
Dab tsi yog ob qho laj thawj tseem ceeb ntawm kev mob caj ces hauv tib neeg?
Muaj peb hom kab mob caj ces: Ib hom kab mob ib leeg, qhov kev hloov pauv cuam tshuam rau ib lub noob. Sickle cell anemia yog ib qho piv txwv. Chromosomal disorders, qhov twg chromosomes (los yog ib feem ntawm chromosomes) ploj lawm los yog hloov. Cov kab mob nyuaj, qhov twg muaj kev hloov pauv hauv ob lossis ntau lub noob
Dab tsi yog qhov tseem ceeb tshaj plaws uas yuav tsum muaj rau cov kua dej ntws hauv cov kav dej Dab tsi lwm yam cuam tshuam rau cov dej ntws?
Thaum ib qho kev quab yuam sab nraud yog exerted rau ntawm cov kua uas muaj, qhov tshwm sim siab yog kis sib npaug thoob plaws hauv cov kua. Yog li txhawm rau kom dej ntws, dej xav tau qhov sib txawv siab. Cov kav dej kuj tuaj yeem cuam tshuam los ntawm cov kua dej, cov yeeb nkab loj, qhov kub thiab txias (cov kav dej khov), cov kua dej ntom ntom
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