________ fill with blood and cause the penis to lengthen during sexual arousal

How does your text explain the positive correlation between intelligence test scores and brain volume?

a) A larger brain produces higher intelligence. b) Environmental variables like childhood nutrition are related to both intelligence and brain size. c) Intellectual activity increases the size of the brain. d) The correlation is largely an artifact of the statistical techniques used in meta-analyses.

Which of the following is most likely to draw on crystallized intelligence?

a) solving a new kind of logic puzzle b) answering trivia questions c) figuring out how to fix an unfamiliar appliance d) negotiating a social situation completely outside of one's experience (e.g., a state dinner)