Chapter exercise p.227
Concept Checking
1. False
There are no light receptors in the yellow (à blind) spot.
2. True
3. True
Multiple Choice
E 7. C
8. B
Short-answer
Questions
15. (a) stimulus
(b) sense
(c) response
(d) stimulus
(e) response
16. (a) It becomes smaller in size.
(b)
E (c) It becomes thicker.
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