In figure 8–4, why might the candle in jar a burn longer than the candle in jar b?

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.

Which of the following human activities resulted in the growth of the north american deer population?

Where is most of the fresh water on earth found a in the ocean b in glaciers and in ice caps c in rivers d in the soil