HELP PLZ THIS IS DUE TOMORROW AND I HAVE STACKED HOMEWORK BRAINIEST FOR FIRST PERSON TO ANSWER CORRECTLY

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.

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.

In the figure below, which letter points to the structure through which water is lost during transpiration?