What is homeostasis?
a. it is a stable external environment that allows survival
c. it is a stable internal environment that allows for survival
b. it is an unstable internal environment
d. it is an unstable external environment that allows for survival

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.

An organism's reproductive strategy includes all of the following except a. the number of offspring produced. b. the amount of energy expended in producing offspring. c. the length of time parental care is given d. the number of alleles an organism passes on.

Explain what role the narrator believes he is playing in telling the story. describe how this belief will affect the story. your answer should be at least 250 words.