bio l5
Terms
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- The embryonic stage where the cells form hollow ball is called _____________
- blastula
- When cells move from the surface of the hollow ball to the interior and form a pore on the surface, it is called _________________.
- blastopore
- The three primary germ layers formed by this cell movement are the _____________________, _____________________, and __________________.
- ectoderm, mesoderm, and endoderm
- Ca++ induces membrane-bound vesicles, called _____________ ____________, to fuse with the plasma membrane in the sea urchin shortly after fertilization.
- cortical granules
- In the sea urchin, one function of the fertilization membrane is to block ________________
- polyspermy
- When a zygotic cell only partially cleaves and the yolk does not divide, it is called _____________________ cleavage.
- meroblastic
- When a zygotic cell completely cleaves, it is called ________________ cleavage.
- holoblastic
- The primitive streak marks which axis of the developing chick? ______________
- anterior/posterior
- When nuclei in fungi are not separated by cross walls it is termed ____________.
- coenocytic
- In Phycomyces, what fuses prior to nuclear fusion during sexual reproduction? ___________________
- gametangia
- Two haploid cells fuse to form a ________________
- diploid Zygote
- Movement of cells to generate a new form is called _______________ _____________.
- morphogenic movements
- Two types of cell movement are called ____________________ & _______________
- ingression and invagination
- We can't observe early embryonic cleavage in the chick because _______________________________________________________________
- occurs inside body of hen
- An individual fungal filament is called a __________________
- hypha