Each of the following organs is a component of the digestive tract except the
A) stomach.
B) pharynx.
C) esophagus.
D) bladder.
E) colon.
Question 2
Photoreceptor cells that are most useful in dim light are
A) rods.
B) cones.
C) amacrine cells.
D) horizontal cells.
E) bipolar cells.