
What part of the eye controls how much light enters the black hole (pupil) in the center of the eye?
A. optic nerve
B. pupil
C. cornea
D. iris
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Which statement best explains the relationship between diet, and osteoporosis?
A. Cholesterol blocks calcium from reaching bone cells. A diet that is high in cholesterol can lead to osteoporosis
B. Calcium and phosphorus build strong and flexible bones. A diet that lacks these nutrients can lead to osteoporosis.
C. Protein and iron build strong and flexible bones. A diet that lacks these nutrients can lead to osteoporosis.
D. Sugars and fats build strong and flexible bones. A diet that lacks these nutrients can lead to osteoporosis.