Is 6 hours of sleep enough? for over 10 years i have trained myself to live off of 6 hour sleep cycles (sleeping in on the weekends when i can). is this healthy?

Which contraceptive methods will prevent the spread of hiv and other stds? check all that apply. diaphragm male condom female condom pill/minipill spermicides intrauterine device (iud) the “morning after” pill

Which of the following types of food would you generally put a demi-glace on? a.poached fish b.beef tenderloin c.cooked asparagus d.chicken lasagna e.vegetable au gratin

Active immunity refers to: a. the defenses people are born with. b. temporary immunity granted from another source. c. immunity gained through immunization and exposure to diseases. d. natural immunities that protect humans from other animal diseases