Which of these is the foundation for relative dating?
a. earth is very old.
b. deeper rock strata are older.
c. radioisotopes decay at a constant rate.
d. organisms can be closely related to each other.

Tides that occur during the new and full moons

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?

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.