Rick’s class plans to study the effect of eating different breakfast foods on grades in morning classes. students in the class will be the test subjects for the investigation. which of the following would most likely make the results of the experiment invalid?

What is the 77 element on the periodtic table

Aheterozygous normal male marries a woman with a sickle cell anemia. give the genotypes and possible phenotypes of the offspring

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