Question

neural tube defects are birth defects of the and
a. neurons... umbilical cord
b. brain... spinal cord
c. brain... umbilical cord
d. spinal cord... umbilical cord
please select the best answer from the choices provided

Explanation:

Neural tube defects occur when the neural tube, which develops into the central nervous system (brain and spinal cord), fails to close properly during embryonic development. The umbilical cord is not related to neural tube formation. Neurons are cells within the nervous system but the defect is at the organ - level (brain and spinal cord), not just on neurons.

Answer:

B. brain... spinal cord