What does the term prograde mean with reference to planetary orbit?
a: revolve from west to east or in a counter-clockwise direction.
b: revolve from east to west or in a counter-clockwise direction.
c: revolve from west to east or in a clockwise direction.
d: revolve from east to west or in a clockwise direction

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.

Explain how light energy is turned into chemical energy? ! due tomorrow!

Which level of taxonomy has the fewest organisms?