Structure and Function of Organisms
Bio 206L

Lab 6: Sea urchin and chick development


1.                  The embryonic stage where the cells form hollow ball is called _____________.

2.                  When cells move from the surface of the hollow ball to the interior and form a pore on the surface, it is called _________________.

3.                  The three primary germ layers formed by this cell movement are the _____________________, _____________________, and __________________.

4.                  Ca++ induces membrane-bound vesicles, called _____________ ____________, 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 __________________.

6.                  When a zygotic cell only partially cleaves and the yolk does not divide, it is called _____________________ cleavage.

7.                  When a zygotic cell completely cleaves, it is called ________________ cleavage.

8.                  The primitive streak marks which axis of the developing chick? ______________.

9.                  When nuclei in fungi are not separated by cross walls it is termed ____________.

10.              In Phycomyces, what fuses prior to nuclear fusion during sexual reproduction? ______________________

11.              Two haploid cells fuse to form a ___________________.

12.              Movement of cells to generate a new form is called _______________ _____________.

13.              Two types of cell movement are called ____________________ & ________________.

14.              We can't observe early embryonic cleavage in the chick because _________________________________________________________.

15.              An individual fungal filament is called a _____________________.



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