Multiple Choice
The developmental signal _______ directs the development of the ventral portion of the spinal cord, and _______ directs the development of the dorsal portion of the spinal cord.
A) Sonic hedgehog; bone morphogenetic protein
B) retinoic acid; Sonic hedgehog
C) bone morphogenetic protein; Sonic hedgehog
D) Sonic hedgehog; retinoic acid
Correct Answer:
Verified
Correct Answer:
Verified
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