Cell adhesion molecules are thought to mediate
A) differentiation.
B) aggregation.
C) proliferation.
D) sprouting.
E) cell death.
Question 2
During the formation of the neural tube, a few cells break off from the neural tube and form a structure that lies just dorsal to the tube. This structure is the neural
A) groove.
B) canal.
C) crest.
D) zone.
E) layer.
