alcithal. / (eɪˈlɛsɪθəl) / adjective. zoology (ntawm ovum) muaj me lossis tsis muaj qe.
Vim li cas ovum hu ua Alecithal?
teb kom tiav: Tib neeg ovum yog alecithal li nws muaj cov qes qis hauv nws vim lub embryo loj hlob mus rau hauv lub qe thiab tseem txuas nrog niamlos ntawm kev tau txais khoom noj los ntawm leej niam los ntawm cov placenta thiab li no yuav tsum muaj ib tug negligible yolk nyob rau hauv nws.
Puas yog tib neeg qe Alecithal?
Tib neeg qe yog me me thiab tsim cov qe me me, hu ua alecithal qe. Lub qe alecithal muaj qhov txwv ntawm cov qe los yog tsis muaj qe. Yolk muab cov as-ham uas xav tau rau kev loj hlob ntawm embryo thiab nws lub neej tseem ceeb heev rau hom oviparous.
cleavage txhais li cas?
1a: qhov zoo ntawm cov khoom siv crystallized lossis pob zeb ntawm kev sib cais raws cov dav hlau tseeb kuj: qhov tshwm sim ntawm qhov sib cais. b: ib feem (raws li pob zeb diamond) tau los ntawm kev sib cais. 2: kev txiav txim ntawm cleaving los yog splitting: lub xeev ntawm cleft.
Cleidoic txhais li cas?
ntawm qe.: kaw rau hauv lub plhaub tsis zoo uas txo qis kev pauv dawb nrogib puag ncig.
