Edward Jenner's work involved . Multiple Choice development of an immunization to protect people against cowpox immunization using a related, less pathogenic organism to give protection against a more pathogenic one development of passive immunotherapy inoculation of dried pus from smallpox pustules into a person to stimulate immunity

Astudent wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. the student measured the growth at the end of the week. all plants received equal amounts of water and sunlight. if you were asked to graph this data, what would you place on the x-axis? a. fertilizer b. water c. plant growth d. week one