#Question id: 5086
#5. Developmental Biology
Cells move to new positions as an embryo establishes its three germ tissue layers during ________.
#Question id: 5087
#5. Developmental Biology
The outer-to-inner sequence of tissue layers in a post-gastrulation vertebrate embryo is ________.
#Question id: 5088
#5. Developmental Biology
If gastrulation was blocked by an environmental toxin, then ________.
#Question id: 5089
#5. Developmental Biology
The archenteron of the developing sea urchin eventually develops into the ________.
#Question id: 5090
#5. Developmental Biology
Which of the following is a correct description of the fate of the germ layers?
#Question id: 5091
#5. Developmental Biology
In all vertebrate animals, development requires ________.