Which reproductive strategy involves high female and low male parental investment?

According to a 2006 survey of dropouts, which of the following reasons for dropping out was LEAST often given by respondents?

A) Classes weren't interesting. B) They had to care for a family member. C) They had many friends who weren't in school. D) They were failing.

According to the text, genetic mutations are:

a. extremely rare, occurring only in about 0.1% of the population. b. found only in individuals who are over the age of 4 since do not begin to occur until some development has taken place. c. always negative, in that they always make it more difficult for the individual to survive. d. quite common.