You Label the Developing Corticospinal Neurons of a Cat with a Fluorescent

Multiple Choice

You label the developing corticospinal neurons of a cat with a fluorescent compound that permits axon visualization. You see that in the spinal cord, fluorescence is found on only one side of the spinal cord. This finding suggests that the age of the animal is most likely

A) less than 25 days
B) at least 25 days
C) at least 35 days
D) at least 55 days