Annual Premium Pay - pay at a percentage of the GS employee's annual rate (instead of the hourly overtime rate) for standby duty, administratively uncontrollable overtime work, or availability hours (5 CFR 550).
Studying evolution is an excellent way for students to learn about the process of scientific inquiry. Evolution offers countless and diverse examples of the ways scientists gather and analyze information, test competing hypotheses, and ultimately come to a consensus about explanations for natural phenomena.
That evolution has taken place is a fact, because it is overwhelmingly supported by many lines of evidence. At the same time, evolutionary questions are still being actively researched by biologists. Comparison of DNA sequences allows organisms to be grouped by how similar their sequences are.