Plaub khub ntawm spermathecal pores muaj nyob rau hauv earthworm los ntawm cov spermatheca (tau txais thiab khaws cov phev thaum lub sij hawm copulation) qhib. Teb tiav: -Option (A) yog lawm. Hauv cov kab mob hauv av, spermatheca yog ib qho khoom nruab nrog ntawm tus poj niam cev xeeb tub thiab nws yog ib lub hnab sab hauv uas yog pear-puab.
Spermathecal pore yog dab tsi?
Spermatheca yog ib qho khoom siv hauv cov poj niam hauv qee cov kab uas muaj qhov qhib rau hauv cov oviduct. Nws khaws cov phev uas tso tawm los ntawm cov txiv neej thaum lub sij hawm copulation. Spermathecal pores yog ntau qhov tsis pom tseeb hauv feeb lossis qhov qhib hauvcov khoom nruab nrog cev no pom hauv qee cov tsiaj xws li cov tsiaj txhu.
Spermathecal aperture yog dab tsi?
Spermathecal apertures yog qhov chaw mos qhib rau ntawm 5-9 ntu ntawm cov kab hauv av. Nws yog nyob rau ntawm ventrolateral sab ntawm intersegmental grooves. Nws yog ib qho tseem ceeb ntawm kev yug me nyuam hauv earthworms. … Spermathecal apertures yog qhov qhib qhov chaw mos uas muaj nyob rau ntawm 5-9 ntu ntawm cov kab hauv av.
Dab tsi yog spermatheca nyob rau hauv lub cev ntawm Pheretima?
Spermathecae yog 4 khub hauv ib qho ntawm 6th, 7th, 8th, 9th ntu situated ventro laterally. Lawv khaws cov phev nyob rau hauv diverticula thaum lub sij hawm copulation thiab lub ampulla muab khoom noj rau cov phev. Txhua tus spermathecae yog lub khob zoo li lub cev uas muaj pear-puab ampulla, luv luvcaj dab thiab luv luv elongated diverticulum.
Puas spermatheca muaj nyob rau hauv txiv neej kab laum?
A) 6th plab ntu ntawm txiv neej. Lus Cim: Cov spermatheca yog ib qho ectodermal organ lub luag hauj lwm rau kev txais, tswj, thiab tso cov phev kom fertilize qe. … Cov phev uas khaws tau tuaj yeem nyob tau thiab muaj sia nyob hauv cov spermatheca tau ntau xyoo.
