Nonnative species are not always a negative factor, they become invasive species .

a.
as soon as they are introduced in an ecosystem
b.
as soon as they leave their original ecosystem
c.
when they start consuming the food meant for the native species
d.
when their presence become economically or environmentally damaging
e.
when they control other species

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.