John wanted to find out which laundry soap was best for removing grass stains. each soap was mixed with warm water. it was then used to scrub a piece of grass-stained cloth for 1 minute. then the amount of stain left on the cloth was measured.
what is the dependent variable?
a. water temperature
b. laundry soap
c. amount of stain left on cloth
d. scrubbing time for each cloth

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