Critics point out that studies on the effectiveness of antioxidants in slowing the aging process thus far have been so-called population studies that are _____ in nature.

An eyewitness to a crime says in court, while pointing to the

defendant, "I was there; I saw that man pull the trigger!" How likely is it that the defendant will be found guilty? A) Quite likely, because eyewitness testimony is very persuasive. B) Quite likely, because eyewitness testimony is very accurate. C) Not likely, because jurors usually need more evidence to convict someone. D) Not likely, because eyewitness testimony has been shown to be inaccurate.

Opiates have hypnotic effects, which means they can:

a. Induce sleep b. Reduce pain c. Increase alertness d. Decrease anxiety