The best way to prevent tonsillitis is to A. Wash your hands frequently. B. Wash your hands thoroughly. C. Avoid sharing eating utensils with other people. D. All of the above

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis

Match the examples to the correct level of organization. 1. system level roses, snakes, puppies 2. organism level roots, stamens, leaves 3. tissue level bone, cartilage, blood 4. organ level heart, veins, arteries

The reactions that occur in the ribosome, where amino acids are combined to form proteins are anabolic or catabolic?