On the twenty-eighth day of embryonic development,the human brain most resembles
A) a hollow tube.
B) a shallow plate.
C) a series of ridges.
D) a series of increasingly larger rectangles.
E) the shape of a fried egg.

Question

Quizplus · Accepted Answer

On the twenty-eighth day of embryonic development, the human brain is in the neurulation stage, where the neural tube is formed. The neural tube is a hollow structure which later develops into the spinal cord and brain. Therefore, the best choice is A) a hollow tube.

On the Twenty-Eighth Day of Embryonic Development,the Human Brain Most