If an optic nerve of a mature frog is transected and half of the associated retina is destroyed,
A) the axons grow out from the retinal ganglion cells in the remaining half of the retina to their original targets on the optic tectum.
B) the destroyed retina regenerates and then axons grow out from the complete retina and innervate the optic tectum in the species-typical fashion.
C) the axons grow out from the retinal ganglion cells in the remaining half of the retina to targets systematically distributed over the entire optic tectum.
D) half of the optic tectum degenerates.
E) both A and D
Question 2
The first growth cone of a developing tract to reach the target is called a __________ growth cone.
A) fast
B) pioneer
C) quick
D) early
E) premier
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