in an experiment, a scientist decides to study the effect of exercise on cholesterol levels in people. he studies two sets of people—those who exercise every day for an hour and those who don’t exercise at all . in this case , the statement that people who exercise for an hour may have lower cholesterol levels is . to test this statement the scientist would measure cholesterol levels in exerciser and non exercisers . the cholesterol levels would be ?

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