The chamber of the heart that endures the highest pressure is the

A) right atrium.
B) left atrium.
C) right ventricle.
D) left ventricle.
E) coronary sinus.

What type of nerve cells line the roof of the nasal cavity?

A) bipolar
B) astrocytes
C) unipolar
D) multipolar

A man and woman undergo genetic testing before conceiving a child. They discover that they are both carriers for Tay-Sachs disease. What are the chances that their offspring will be a carrier for Tay-Sachs disease as well?

A) 100%
B) 75%
C) 50%
D) 25%
E) 0%

Which of the following regions of the pharynx is correctly described?

A) oropharynx-the area behind the mouth
B) nasopharynx-area where the pharynx divides into the larynx and esophagus
C) laryngopharynx-area behind the nose

The first animals to show cephalization have several characteristics. Which of the following is NOT one of them?

A) These animals were triploblastic.
B) These animals had a proboscis.
C) These animals were in phylum Platyhelminthes.
D) These animals are placed in the group Lophotrochozoa.
E) These animals followed the protostome pattern of embryonic development.