Question 1
Visual pigments are molecules made of
◦ protein only.
◦ carbohydrate only.
◦ vitamin derivative only.
◦ steroid only.
◦ protein and a vitamin derivative.
Question 2
When light hits the retina, the image is
◦ exactly as it enters the eye.
◦ upside down.
◦ reversed left to right.
◦ upside down and normal from left to right.
◦ upside down and reversed left to right.