Switching from grain-fed to range-fed livestock would free up enough grain to feed about ________ people while using less fuel, water, and land.
a. 4 million
b. 40 million
c. 400 million
d. 4 billion
e. 40 billion
Answer: C
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The synthesis of collagen requires vitamin C to work with what other nutrient?
a. Vitamin K b. zinc c. Iron d. Magnesium e. Vitamin A
Shock-wave therapy may be useful in treating which of the following disorders?
A) colon cancer B) gallstones C) diarrhea D) irritable bowel syndrome
What best describes a benefit of a point of service (POS) plan?
a. Plan members can get medical care from both in- and out-of-network providers. b. Plan members receive a tax-advantaged health reimbursement arrangement. c. Plan members can use specialty services without requiring a referral. d. Plan members are always enrolled in a health savings account.
A researcher wants to identify lifestyle factors that increase the risk of stomach cancer in men. His study design involves enrolling 250 men who have stomach cancer and 250 men who are cancer-free but have similar characteristics and backgrounds as the men who have stomach cancer. The researcher collects and analyzes information about each participant's lifestyle. Based on this information, what kind of study is the researcher conducting?
A. Experimental B. In-vivo C. Cohort D. Case-control