Problem: A team of researchers want to explore how a particular chemical impacts cellular function. They set up two groups of petri dishes to grow neuron cells. On one set of petri dishes, they add the chemical of interest dissolved in water. On the other set of petri dishes, they add only water. They check to see the condition of the cells after 12 hours. Which of the following is the control? A team of researchers want to explore how a particular chemical impacts cellular function. They set up two groups of petri dishes to grow neuron cells. On one set of petri dishes, they add the chemical of interest dissolved in water. On the other set of petri dishes, they add only water. They check to see the condition of the cells after 12 hours. Which of the following is the control? The neuron cells The condition of the cells after 12 hours The dishes with the chemical dissolved in water The dishes with only water