What was the most common motivation given by boys for engaging in sexual intercourse for the first time?

The brains of persons with schizophrenia are usually smaller than normal, indicating that they have fewer neurons

Thus, according to Toro and Deakin, schizophrenia may result from a. numerous small strokes damaging the brain regions associated with the development of schizophrenia. b. a deterioration of the myelin sheaths throughout the brain tissue. c. the inability of the schizophrenic brain to continually create new neurons to replace old ones that have died. d. a lack of acetylcholine, which cause numerous neurons to rapidly die.

An anthropologist is studying a remote tribe of people who have had little to no contact with outside civilization. She notices that 2-year-olds in the tribe imitate others and show empathy and cooperation much like her 2-year-old nephew back in the United States. According to evolutionary theorists, these behaviors may be universal in the human species because they facilitate

a. positive reinforcement. b. fitting into a social group. c. ego development. d. social learning.