Which of the following is true about chlorophyll? *
absorbs mostly red and blue/violet light
absorbs mostly green light
it is responsible for the red color of many leaves in the fall

it provides color to flower petals and fruits

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.