In which way does the notochord differ from the neural tube?
A) The notochord develops from endoderm, whereas the neural tube develops from ectoderm.
B) The neural tube forms the brain and spinal cord, and the notochord serves as a support structure and major organizer for the embryo.
C) Development of the neural tube characterizes all vertebrate embryos, whereas development of the notochord is restricted to amphibians.
D) During gastrulation, the neural tube forms first, followed by formation of the notochord.
E) The neural tube forms the spinal cord, and the notochord forms the vertebrae that surround and protect the spinal cord.

Question

Quizplus · Accepted Answer

The neural tube forms the brain and spinal cord, while the notochord serves as a support structure and major organizer for the embryo. The other options are incorrect: A is false because the notochord develops from mesoderm, not endoderm; C is false because development of the notochord characterizes all chordate embryos; D is false because formation of the notochord actually precedes formation of the neural tube; and E is false because the vertebrae develop around the notochord, not vice versa.

In Which Way Does the Notochord Differ from the Neural