Lab 2 exhibit and extra slide quiz

Question 1

Fill in the blanks: Early Gastrulation: the bottle cells of the margin move inward to form the —— — of the blastopore, and the mesodermal precursors involute under the roof the ———-. The —— —– will change positions as gastrulation continues.

Answer 1

dorsal lip/ blastocoel/ animal pole

Question 2

Fill in the blanks: Mid Gastrulation: The ——— forms and displaces the blastocoel and cells migrate from the lateral and ventral lips of the ———– into the embryo. The cells of the ——- hemisphere mights down toward the vegetal region, moving the ———- to the region near the vegetal pole.

Answer 2

archentron blastopore animal blastopore

Question 3

Fill in the blanks: near the end of gastrulation: the ——— is obliterated, the embryo becomes surrounded by ———, the endoderm has been internalized and the ——— cells have been positioned between the ectoderm and the endoderm.

Answer 3

blastocoel ectoderm mesodermal

Question 4

Fill in the blanks

Answer 4

Question 5

Tunicates are the only animal with the ability to synthesize what?

Answer 5

cellulose

Question 6

Highlight vleavage, gastrulation, neurulation and segmentation and finally organogensis.

Answer 6

Question 7

Fill in the blanks

Answer 7

Question 8

Fill in the blanks

Answer 8

Question 9

Fill in the blanks:

Answer 9