The pangaea theory supports the theory of plate tectonics because

a) it is based on the idea that there were several land masses when earth was first created
b) it is based on the idea that all the present continents were one supercontinent
c) it does not require scientists to support the notion that earth’s plates can move
d) one day, earth will have one large land mass again

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.

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above

Which of these is not an obstical to the future of space exploration? fundingresearch ideas technologytime