#Question id: 5088
#Unit 5. Developmental Biology
If gastrulation was blocked by an environmental toxin, then ________.
#Question id: 5089
#Unit 5. Developmental Biology
The archenteron of the developing sea urchin eventually develops into the ________.
#Question id: 5090
#Unit 5. Developmental Biology
Which of the following is a correct description of the fate of the germ layers?
#Question id: 5091
#Unit 5. Developmental Biology
In all vertebrate animals, development requires ________.
#Question id: 5092
#Unit 5. Developmental Biology
The least amount of yolk would be found in the egg of a ________.
#Question id: 5093
#Unit 5. Developmental Biology
Which of the following is a result of gastrulation in animals?
I) The archenteron is formed.
II) The body axes are established.
III) The germ layers are formed.