Vim li cas dej hiav txwv anemones tso saib Biradial symmetry?
Vim li cas dej hiav txwv anemones tso saib Biradial symmetry?

Video: Vim li cas dej hiav txwv anemones tso saib Biradial symmetry?

Video: Vim li cas dej hiav txwv anemones tso saib Biradial symmetry?
Video: Dej Hiav Txwv Quas - Pob Tsuas Xyooj 2024, Kaum ib hlis
Anonim

Jellyfish thiab hiav txwv anemones yog ib co tsiaj nrog lub cev npaj no. Thiab tam sim no tus uas koj tau tos rau: biradial symmetry , qho yog thaum lub cev ua tau muab faib ua qhov sib npaug, tab sis tsuas yog nrog ob lub dav hlau. Nws yog txawv ntawm radial symmetry , vim hais tias ob lub dav hlau faib cov kab mob, tab sis tsis ntau tshaj ob.

Ib yam li ntawd, lub ntsiab lus ntawm Biradial symmetry yog dab tsi?

biradial symmetry Kev npaj ntawm lub cev ntawm cov tsiaj xws li cov khoom zoo sib xws yog nyob rau ntawm ib sab ntawm lub hauv paus axis thiab txhua ntawm plaub sab ntawm lub cev yog zoo tib yam rau sab nraud tab sis txawv ntawm sab uas nyob ib sab. A Phau ntawv txhais lus ntawm Ecology. × " biradial symmetry ."

Tsis tas li ntawd, vim li cas cov ntses hnub qub muaj Pentaradial symmetry? Lawv pom ib tug superficially radial symmetry . Ntses hnub qub feem ntau muaj tsib lossis ntau dua "caj npab" uas tawm los ntawm qhov tsis paub meej disk ( pentaradial symmetry ). Qhov tseeb, lawv cov poj koob yawm txwv evolutionary tau ntseeg muaj muaj ob tog symmetry , thiab hiav txwv hnub qub ua pom ib co superficial seem ntawm lub cev qauv no.

Ntxiv mus, yog vim li cas nplooj symmetrical?

Nyob rau hauv cov xwm thiab biology, symmetry yog ib txwm kwv yees. Piv txwv li, cog nplooj - thaum xav txog symmetrical - tsis tshua muaj kev sib tw raws nraim thaum folded hauv ib nrab. Symmetry tsim ib chav kawm ntawm cov qauv hauv qhov xwm txheej, qhov ze-repetition ntawm cov qauv qauv yog los ntawm kev xav lossis kev sib hloov.

Dab tsi yog qhov peculiarity ntawm ob tog symmetry?

yog dab tsi peculiarity ntawm ob tog symmetrical . Symmetrical kev npaj ntawm cov kab mob los yog ib feem ntawm cov kab mob raws li ib tug central axis, thiaj li hais tias cov kab mob los yog ib feem yuav muab faib ua ob qho tib si halves. Ob sab symmetry yog tus yam ntxwv ntawm cov tsiaj uas muaj peev xwm txav mus los ntawm lawv qhov chaw nyob.

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