Precipitation is more likely to occur
a) when the air is saturated
b) when condensation nuclei are present
c) when warm air rises and cools
d) all of these
e) none of these
my guess is c. is that right?

What are some things that limit population growth?

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.

Witch theory suggests all living things are made up of cell or cells