The continental united states is divided into two very large watersheds, one which drains into the and the other into the

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

When a person is exercising the body needs to deliver increased amounts of oxygen to the muscles which component of blood ensures that the muscles will receive it

Select the true statements about eubacteria. most live as decomposers and heterotrophs. most only thrive in a narrow range of environments. certain eubacteria are responsible for food poisoning. eubacteria thrive in extreme environments.