How many total ATOMS are represented?

2Fe(NO3)2

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.

What happens to the amount of waste in the pond as the ecosystem ages?

What do all celular activities in living organisms use as a source of energy?