The florida panthers population decreased to only 20 individuals at one point in time. as the population rebounds, the genetic diversity is greatly reduced. this is an example of what mechanism of evolution?

a.) founder effect

b.) genetic drift

c.) bottleneck effect

d.) gene flow

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.