Choose all the answers that apply. Grasslands o have less than 25cm of rain per year are used to grow cereal grasses are only found in the United States has the largest species diversity of all the biomes O are largely temperate​

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.

In general, are there any major differences that you can see? explain

Vessels draining the myocardium of the heart, open primarily ,into which chamber?