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The Human Retina Contains About ________ Rods and About ________

Question 72

Multiple Choice

The human retina contains about ________ rods and about ________ cones.


A) 60 million; 3 million
B) 9 million; 120 million
C) 32 million; 320 million
D) 120 million; 6 million
E) 160 million; 3 million

Correct Answer:

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