Any potentially harmful substance that humans add to an ecosystem
a)
is called pollution.
b)
might cause acid rain.
c)
is always a carcinogen.
eliminate
d)
deplete the ozone layer.

How much of the united states female population works outside of the home? a. half b. two-thirds three-quarters d. one-third select the best answer from the choices provided.

Which two characteristics belong to mahayana buddhism. a.followers worship and offer animal sacrifice at festivals b.a followers highest aim is to attain the status of a bodhisattva c.an emphasis is placed on fulfilling sensual pleasure d.this form of buddhism is the most acient for od buddhism that exists today e.followers belive that everyone is capable of attaining enlightenment

Which of the following do scientists believe about homo sapiens?