The eastern coral snake and Texas coral snake look almost identical and are often mistaken, but they are actually different species. Because they are different species, what can be concluded?

a They will have sterile offspring.
b They have different venom.
c They have different coloring patterns.
d They cannot hunt prey in the same manner.

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.