The body's most widespread nonspecific defense against pathogens is (are) A. tears B. mucus C. saliva D. skin

Which of the following is not characteristic of a behavior? a. It can be observed. b. It can be recorded. c. It can be influenced by the environment. d. It can include a person's thoughts.

The group of macromolecules that serves as the main source of energy for living things is

Which accounts for the highest water withdrawals in the United States? O mining O irrigation o industrial uses thermoelectric power

Why are carbohydrates important to organisms?

The process of evolution, or genetic change over time, has resulted in the wide variety of living things that exist today.

Name five elements that make up the molecules in living organisms

Which phase of water has the greatest amount of kinetic energy

Are the excretory system and urinary system the same

What is correct sequence of repair as a fracture bone goes through the healing process?

Which is an example of science playing a role in developing technology? A. the use of an electric spark to produce amino acids from gases that are present in Earth's early atmosphere B.