Filtering blood to remove nitrogenous compounds and other wastes is a role of the , while detoxifying material absorbed by the intestines is a role of the .

Provide one reason why mitosis occurs.

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .

Which of the following determines the specificity of a dna probe? a. type of radiation b. level of enzymatic activity c. number of neutrons d. complementary base pairing