Qhov Tseem Ceeb Qhov txawv - Telolecithal vs Centrolecithal Egg
Muaj ntau hom qe (ova), thiab raws li kev faib tawm ntawm cov qe qe, cov qe raug cais raws li Telolecithal thiab Centrolecithal qe. Qhov sib txawv tseem ceeb ntawm Telolecithal thiab Centrolecithal qe yog nyob ntawm kev faib cov qe nyob rau hauv cytoplasm ntawm lub zes qe menyuam. Nyob rau hauv telolecithal qe, lub yolk yog unevenly faib nyob rau hauv lub ovum cytoplasm. Nyob rau hauv lub qe centrolecithal, lub yolk yog concentrated mus rau qhov chaw ntawm lub zes qe menyuam cytoplasm.
Telecithal qe yog dab tsi?
Telecithal qe feem ntau muaj nyob rau hauv ntses, amphibians, tsiaj reptiles, thiab noog. Cov qe no muaj cov qe qe uas muab faib thoob plaws hauv lub cytoplasm ntawm lub zes qe menyuam. Yog li ntawd, lub yolk yog hais tias yuav tsum tau faib unevenly. Telolecithal qe yog tsim los ntawm ob lub ntsiab ncej. Cov nroj tsuag yog thaj chaw uas cov yolk yog densely faib. Kev faib tawm ntawm yolk yog tsawg ntom nyob rau hauv cov tsiaj ncej. Hauv Telolecithal qe, yolk tsim cov granules loj uas hu ua yolk platelets. Lawv yog oval nyob rau hauv cov duab thiab flattened lug.
Daim duab 01: Telolecithal qe ntawm ntses
Thaum lub sijhawm cleavage, thaum lub sij hawm embryonic txoj kev loj hlob, lub qe Telolecithal undergo discoidal cleavage ua rau blastocoel. Ntawm no, lub cytoplasm tsis cleave kiag li.
Centrolecithal qe yog dab tsi?
Centrolecithal qe feem ntau muaj nyob rau hauv kab thiab ib co arthropods. Hauv centrolecithal qe, cytoplasm yog concentrated mus rau nruab nrab ntawm lub zes qe menyuam. Yog li ntawd, lub cytoplasm ntawm lub zes qe menyuam yog txwv rau ib tug nyias peripheral txheej. Hauv cov qe centrolecithal, feem ntau ntawm cov yolk yog kua, tab sis cov khoom tseem tuaj yeem pom. Qhov no hu ua yolk sphere.
Daim duab 02: Centrolecithal Eggs of Insects
Thaum lub sijhawm cleavage, cov qe Centrolecithal undergo superficial cleavage. Lub cleavage yog txwv rau nyias cytoplasm txheej. Yog li ntawd, lub qe tsis cleave.
Dab tsi zoo sib xws ntawm Telolecithal thiab Centrolecithal qe?
- Ob lub qe Telolecithal thiab Centrolecithal yog hu ua raws li kev faib cov qe qe.
- Cov qe qe hauv ob lub qe yog koom nrog kev muab lub zog rau kev saib xyuas lub embryonic txoj kev loj hlob.
Qhov txawv ntawm Telolecithal thiab Centrolecithal qe yog dab tsi?
Telolecithal vs Centrolecithal qe |
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| Nyob hauv cov qe telolecithal, lub yolk yog unevenly faib nyob rau hauv lub zes qe menyuam cytoplasm. | Nyob rau hauv centrolecithal qe, lub qe yog concentrated nyob rau hauv nruab nrab ntawm lub cytoplasm ntawm ovum cytoplasm. |
| Kev faib cov qe qe | |
| thoob plaws lub cytoplasm ntawm lub zes qe menyuam, raws cov zaub ncej qe qe raug faib. | Qe qe yog concentrated nyob rau hauv nruab nrab ntawm lub cytoplasm ntawm lub zes qe menyuam nyob rau hauv centrolecithal qe. |
| Yolk yog tam sim no loj granules hu ua yolk platelets hauv telolecithal qe. | Yolk feem ntau yog kua, tab sis qee qhov khoom muaj tam sim no uas yog hu ua yolk spheres hauv centrolecithal qe. |
| Tsob Ntoo Tsob Ntoo thiab Tsiaj Ncej | |
| Ncej ncej thiab tsiaj ncej muaj nyob rau hauv lub qe telolecithal. | Ncej ncej thiab tsiaj ncej tsis muaj nyob rau hauv centrolecithal qe. |
| Kev faib tawm ntawm Cytoplasm hauv Ovum | |
| Kev faib tsis sib npaug ntawm cytoplasm ntawm lub zes qe menyuam yog pom hauv telolecithal qe. | Lub cytoplasm tsim ib txheej nyias nyob rau hauv lub periphery ntawm lub cell nyob rau hauv centrolecithal qe. |
| Cleev | |
| Discoidal cleavage ntawm lub qe ua rau cov blastocoels pom nyob rau hauv lub telolecithal qe. | Kev cleavage superficial yog pom nyob rau hauv lub qe centrolecithal. |
| Examples | |
| Ntses, tsiaj reptiles, amphibians, thiab noog muaj los ntawm lub qe telolecithal. | Kab thiab qee cov arthropods muaj lub qe centrolecithal. |
Summary – Telolecithal vs Centrolecithal Egg
Telolecithal thiab Centrolecithal qe yog ob hom qe categorized raws li kev faib ntawm lawv cov qe qe. Yog tias pom qhov tsis sib xws ntawm lub qe qe, nws raug xa mus rau lub qe Telolecithal. Yog hais tias lub qe qe yog concentrated rau hauv nruab nrab thiab ib tug nyias peripheral cytoplasm raug pom, cov qe no raug xa mus rau lub qe Centrolecithal. Qhov no yog qhov txawv ntawm telolecithal thiab centrolecithal qe.
