Topics: Population Ecology Quiz
What is the approximate population of men age 65-69 in the US in 2014? (see pyramid)
A. 7.5 million
B. 10.5 million
C. 5 million
D. 12 million
Select your answer:

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Vision › View_____ is dependent upon overlapping fields of vision combined into one image in the brain
A. optical illusions
B. depth perception
C. perceiving motion
D. visual perception
Vessels › View
Toxic substances absorbed along the digestive tract put stress on the liver because all of the deoxygenated blood from the digestive organs is drained by the __________.
A. renal veins
B. inferior vena cava
C. hepatic portal vein
D. abdominal aorta