Which of the following is true about mammals?
A. They have right aortic arch only
B. They have left aortic arch only
C. They have left and right aortic arches only
D. They do not have aortic arches
Answer:B
Which of the following is true about mammals?
A. They have right aortic arch only B. They have left aortic arch only C. They have left and right aortic arches only D. They do not have aortic arches