D. a control group because it can be used as a reference
A control group is necessary in experimental investigations to provide a baseline for comparison with the experimental group that is being subjected to different conditions. In this case, the control group would likely be the Elodea plants kept at a normal or standard temperature, while the experimental group would be the Elodea plants subjected to different temperature conditions. This allows Jeremy to determine the effects of the temperature variables on the Elodea plants.
Jeremy is setting up an experiment in his garage on Elodea (an aquatic plant). He plans to test different temperature conditions. What will this type of experimental investigation MOST likely include?
A. a control group because the variables are changed
B. a standard group because the variables are changed
C. a standard group because it can be used as a reference
D. a control group because it can be used as a reference
1 answer