Evidence that living things have evolved over hundreds of millions of years can be found in

a)
particles in the air

b)
rocks containing fossils

c)
tree rings from recently logged trees

d)
chemicals in human hair

Which element provides strength to the exoskeleton of clams and oysters

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.

_is a product of the first stage of photosynthesis. atpglucosecarbon dioxidewater