What is a strategy prokaryotes to help them survive

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.

Which is the most likely reason the writer of the play pygmalion chose to change the character of galatea from a statue to working-class woman?

What happens when two nitrogen atoms share electrons