Why repeat your investigation 3 times? why is it important to repeat the steps of data collection in biology?

Apart of an ecosystem that can restrict the growth of a population is referred to as

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.

Describe the relationship between isotonic solutions, equilibrium, and water movement into and out of a cell.