in an experiment, a scientist decides to study the effect of exercise on cholesterol levels in people. he studies two sets of people—those who exercise every day for an hour and those who don’t exercise at all . in this case , the statement that people who exercise for an hour may have lower cholesterol levels is . to test this statement the scientist would measure cholesterol levels in exerciser and non exercisers . the cholesterol levels would be ?

Some species of wasps are social. the queen starts a colony from scratch each spring. she builds a small nest, and lays and raises a group of female workers. the workers enlarge the nest while the queen continues to lay eggs. unfertilized eggs become males that mate with newly hatched females. all of the wasps except the newly fertilized females die by the summer. which best describes this behavior? a)it is beneficial only to the males that do not fertilize eggs. b)it is beneficial only to the female workers that are not fertilized. c)it is beneficial to each one of the individual colony members. d)it is beneficial to the whole species, but not to all of the individual members.