Failure of blood vessels to form around the yolk sac of a developing chick most likely signals that the _______ is impaired.

Question

Quizplus · Accepted Answer

The mesoderm is the germ layer responsible for forming the circulatory system, including the blood vessels. Therefore, failure of blood vessels to form around the yolk sac would suggest that the mesoderm is impaired, as it is not properly developing the necessary blood vessels.

Failure of Blood Vessels to Form Around the Yolk Sac