What percent of the world's population is comprised of developed countries?

What is the most accurate statement about sleep and memory?

a. During sleep, neurons in the hippocampus are silent b. During sleep, more than 100 genes decrease their activity c. "offline" replay that occurs during sleep helps the cortex undergo LTP d. Contrary to what researchers expected, sleep has no measurable effect on memory

Asch (1955) designed his line judgment study to test whether people will conform to group norms when

a. the situation is more simple than in Sherif's autokinetic effect study b. the situation is more threatening than in Sherif's autokinetic effect study c. the situation is less ambiguous than in Sherif's autokinetic effect study d. the situation is more anxiety-provoking than in Sherif's autokinetic effect study