Question 2 of 30 What is a niche?
O A. A group of organisms that produce fertile offspring
B. All of the resources a species uses within its ecosystem
O C. The place where a particular plant or animal lives
O D. A group of organisms that interact within an ecosystem
SUBMIT
(HURRY N HEL PLEAS)

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.