Lab 6 - 8. The primitive streak marks which axis of the...

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Lab 6: Sea urchin and chick development 1. The embryonic stage where the cells form hollow ball is called _blastula____________. 2. When cells move from the surface of the hollow ball to the interior and form a pore on the surface, it is called _gastrulation________________. 3. The three primary germ layers formed by this cell movement are the ___endoderm___________, ______mesoderm_________, and ___ectoderm________. 4. Ca ++ induces membrane-bound vesicles, called _cortical___granules________, to fuse with the plasma membrane in the sea urchin shortly after fertilization. 5. In the sea urchin, one function of the fertilization membrane is to block _other sperm?______________. 6. When a zygotic cell only partially cleaves and the yolk does not divide, it is called __meroblastic__________________ cleavage. 7. When a zygotic cell completely cleaves, it is called ___holoblastic_____________ cleavage.
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Unformatted text preview: 8. The primitive streak marks which axis of the developing chick? _anterior posterior axis_____________. 9. When nuclei in fungi are not separated by cross walls it is termed _coenocytic________. 10. In Phycomyces , what fuses prior to nuclear fusion during sexual reproduction? __gametangia____________________ 11. Two haploid cells fuse to form a _zygote________________. 12. Movement of cells to generate a new form is called _morphogenetic___ _____movement________. 13. Two types of cell movement are called __invagination__________________ & ___ingression_____________. 14. We can't observe early embryonic cleavage in the chick because ___it occurs inside of the hen______________________________________________________. 15. An individual fungal filament is called a _hypha____________________. * Entire mass of hyphae is called mycelium...
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