Tardigrades yog cov tsiaj txhu ntau yam nrog ib puag ncig 4,000 hlwb (hauv cov neeg laus), nyob ntawm hom. Qee hom muaj ntau txog 40,000 hlwb. Tardigrades yog qhov tshwj xeeb uas lawv tau hatched twb muaj tag nrho cov hlwb lawv yuav muaj rau tag nrho lawv lub neej.
Puas yog dej dais ib leeg xwb?
Txawm hais tias lawv qhov me me zoo ib yam li cov kab mob unicellular, tardigrades yog cov tsiaj txhu ntau yam (qee zaum muaj 40, 000 hlwb).
Tardigrade hlwb loj npaum li cas?
Lawv suav tias yog cov txheeb ze ze ntawm arthropods (piv txwv li, kab, crustaceans). Tardigrades feem ntau yog li 1 mm (0.04 nti) los yog tsawg duaLawv nyob hauv ntau qhov chaw nyob thoob ntiaj teb: hauv cov av ntub dej, ntawm cov paj ntoo, hauv xuab zeb, hauv dej tshiab, thiab hauv hiav txwv.
Dab dej dais puas muaj sia nyob xoom?
Me me thiab tawv
Piv txwv li, tardigrades tuaj yeem mus txog 30 xyoo yam tsis muaj zaub mov lossis dej. Lawv tseem tuaj yeem nyob ntawm qhov kub li txias li xoom lossis siab tshaj qhov kub hnyiab, ntawm qhov siab tshaj rau lub sijhawm ntawm dej hiav txwv qhov tob tshaj plaws, thiab hauv lub tshuab nqus tsev.
Lub cell ntawm Tardigrade yog dab tsi?
10.3 Lub Cia Cells ntawm TardigradesNyob rau hauv tardigrades, cov no feem ntau hu ua "storage cells" thiab lawv txuas mus rau lub plab thiab nqa cov as-ham, ua raws li detachment thiab supposedly random faib ntawm cov hlwb thiab cov as-ham nyob rau hauv lub cev kab noj hniav kua raws li tus tsiaj txav mus (Fig. 10.2).
