Inquiry into Life 14th Edition by Sylvia Mader,Michael Windelspecht

تمرين 9

Choose the best answer for each question.
If the digestive and respiratory tracts were completely separate in humans, there would be no need for
A) swallowing.
B) a nose.
C) an epiglottis.
D) a diaphragm.
E) All of these are correct.