Two students are planning an experiment that will test how planaria (aquatic flatworms) resins to different environments. They will conduct two investigations-one that tests the worms’ responses to different water temperatures and one that tests the worms’ response to different levels of acidity. Student 1 wants to buy two groups of flatworms And use a different group for each investigation. Student to think the same group of warms And use a different group for each investigation. Student 2 think the same group of worms should be used for both investigations.
Do you think either student’s method would give more accurate results?why or why not? Explain your response.