20. Your Biology teacher has assigned a lab project to test the effect of environmental factors on mitosis of onion roof cells. Your group has chosen temperature as your variable and you
hypothesize that an increase in temperature will increase the rate of mitosis. What specific
observations would you likely see at the cellular level if your hypothesis is true? What effects
would you see for the plant as a whole?

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.