1.3.2 Test (CST): Introduction to Biology Question 3 of 25
You are investigating how salt affects the growth of mold on food. Using slices of bread as the food, you create experimental groups treated with 0 mg, 10 mg, or 50 mg of salt. Each day you make observations and record whether any of the groups are showing signs of mold growth.
What is the independent variable in this experiment?
