Which of the following is not true?
a)atp is formed during both photosynthesis and cellular respiration
b)both plant cells and animal cells carry out cellular respiration
c)carbon dioxide is released during photosynthesis and used during cellular respiration
d)oxygen is used during cellular respiration and released during photosynthesis

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.