Which characteristic is an advantage of sexual reproduction?

What is the relation ship between structure and function in an organism

Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?

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.