Cov txheej txheem:
Video: Plaub cov pejxeem concentration yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
East Asia, South Asia, Europe thiab Eastern North America muaj cov plaub loj concentrations ntawm pej xeem . Yog peb saib ze ntawm cov no plaub thaj chaw ntawm concentrations , peb tuaj yeem txheeb xyuas "pawg" ntawm ntom pej xeem.
Xav txog qhov no, peb pawg neeg tseem ceeb yog dab tsi?
Daim duab 1.23 Peb pawg tib neeg tseem ceeb ntawm lub ntiaj teb yog sab hnub tuaj Asia, sab hnub tuaj Asia, thiab Teb chaws Europe . Feem ntau ntawm cov cheeb tsam no uas muaj neeg coob coob yog nyob rau hauv hom C huab cua.
Kuj Paub, cov pejxeem nyob qhov twg? Feem ntau ntawm lub ntiaj teb no pej xeem yog concentrated hauv Suav teb, Is Nrias teb, thiab cov teb chaws nyob ib puag ncig. Tebchaws Meskas zoo ib yam li daim ntawv qhia ntiaj teb nyob rau hauv uas hais txog ib nrab ntawm lub tebchaws pej xeem nyob hauv thaj chaw daj thiab ib nrab nyob hauv thaj chaw dub.
Tsis tas li ntawd, plaub cheeb tsam uas muaj neeg coob tshaj plaws yog dab tsi?
Ob feem peb ntawm cov neeg nyob hauv lub ntiaj teb no yog pawg nyob rau hauv plaub cheeb tsam -East Asia, South Asia, Southeast Asia, thiab Europe.
Dab tsi yog tsib cov pejxeem concentration?
Cov ntsiab lus hauv cov teeb no (5)
- East Asia. Tuam Tshoj, Nyiv, Kaus Lim Qab Teb - 1/4 ntawm Cov Neeg Ntiaj Teb.
- South Asia. Is Nrias teb, Pakistan, Sri Lanka, Bangladesh - 1/5 ntawm lub ntiaj teb pop.
- Teb chaws Europe. Western, Eastern, Thiab Russia - 1/8 ntawm lub ntiaj teb pop hauv 4 lub teb chaws.
- South East Asia. (series ntawm Islands bet.
- Eastern North America.
Pom zoo:
Puas yog cov plaub hau daj lossis cov plaub hau xim av muaj ntau dua?
Cov plaub hau xim av yog qhov tseem ceeb tshaj cov plaub hau daj. Cov me nyuam uas muaj ib tug xim av-haired allele thiab ib tug blonde-haired allele yuav nthuav cov plaub hau xim av thiab. Tsuas yog cov uas muaj ob lub ntsej muag plaub hau daj yuav muaj cov plaub hau daj
Yuav ua li cas ib tug capita tus nqi ntawm cov pejxeem loj hlob muaj feem xyuam rau cov pejxeem?
Kev loj hlob ntawm pej xeem yog ntsuas nyob rau hauv cov tib neeg nyob rau hauv ib tug pej xeem (N) dhau sij hawm (t). Per capita txhais tau hais tias ib tus neeg, thiab qhov kev loj hlob ntawm ib tus neeg muaj feem cuam tshuam txog tus naj npawb ntawm kev yug thiab kev tuag hauv cov pejxeem. Qhov sib npaug ntawm kev loj hlob hauv logistic xav tias K thiab r tsis hloov lub sijhawm hauv cov pejxeem
Dab tsi yog cov pejxeem loj tshaj plaws uas lub ecosystem tuaj yeem txhawb nqa lub sijhawm?
Lub peev xwm nqa tau yog cov neeg coob tshaj plaws uas ib puag ncig tuaj yeem txhawb nqa txhua lub sijhawm. Yog tias muaj peev txheej tseem ceeb tsawg, xws li zaub mov, lub peev xwm nqa tau yuav txo qis ua rau cov tib neeg hauv cov pej xeem tuag lossis tsiv teb tsaws. 32
Qhov twg ntawm cov plaub hau plaub hau yog ib txwm plaub hau plaub hau?
square Tsis tas li ntawd nug, qhov ntsuas ntawm ib lub quadrilateral tsis tu ncua yog dab tsi? Yog, sab hauv lub kaum sab xis ntawm txhua lub ces kaum ntawm ib lub quadrilateral tsis tu ncua yog txhua 90 degrees (360 degrees / 4 fab).
Cov pejxeem thiab zej zog yog dab tsi?
Population - Tag nrho cov tswv cuab ntawm ib hom tsiaj uas nyob hauv ib cheeb tsam uas tau hais tseg. Zej Zog - Txhua hom sib txawv uas nyob ua ke hauv ib cheeb tsam. Ecosystem - tag nrho cov nyob thiab tsis nyob ib puag ncig ntawm ib cheeb tsam