Bactrian camels, dromedaries, llamas, and alpacas are all members of the same taxonomic
family, Camelidae. Members of this family all have two toes, no hooves, true canine teeth, and
a split upper lip. The family Camelidae originated in North America. The physical features of
animals in this family and the family's geographical origin provide evidence that all these
animals -
A. live in the same type of ecosystem
B. have a common ancestor
C. exchanged DNA at some point in the past
D. have slowly evolved to become herbivores

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.