The ____________ is the critical period in women effecting sexual orientation of male offspring

What evidence has been cited by scientists who propose that alcoholism is related to endogenous opioid production?

a. Alcohol is an opioid derivative. b. Rats given morphine refuse alcohol. c. The symptoms of withdrawal from alcohol and heroin are similar. d. Opioid-antagonists can reduce the subjective "high" of drinking.

In a symmetrical binomial probability distribution, the greatest frequency of scores is near the a. ends of the distribution

b. center of the distribution. c. top of the distribution. d. bottom of the distribution.