In a study about pain relievers, doctors wanted to know if different pain relievers are more effective at relieving pain after surgery than others. Doctors gave subjects Tylenol, Advil, Aleve and aspirin. Each type of pain reliever was given at the maximum recommended dosage. Doctors then asked the subjects about their pain levels over a six hour period. What would be the dependent variable in this experiment? the pain levels experienced by the subjects the age of the subjects the dosage of the pain reliever the types of pain reliever

In a vegetable garden 45 bean plants have been eaten by deer 5 are untouched what is the frequency of bean plants in the garden that have been eaten?

In the presence of oxygen, glycolysis is followed a. the krebs cycle b. lactic acid fermentation c. alcoholic fermentation d. photosynthesis

Which of the following statements is correct in hour our immune system responds to a potential pathogen? a. the adapted immune system will call on the innate immune system to destroy the pathogen. b. b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c. the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. d. the t-cells in the adapted immune systems are the first to recognize the pathogen vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a. antigen, antibody b. antibody, antigen c. antibody, antibiotic d. antibiotic, antibody