How do fossils provide information of Earth's history? A. Fossils provide evidence of rock types that existed in the past.
B. Fossils are used to calculate Earth's age.
C. Fossils provide information on what type of weather existed in the past.
D. Fossils are preserved physical evidence of ancient life.

Around the third week of a college class, a professor decides she’s had enough, is tired of dealing with bureaucracies, and wants out. so one day, instead of coming to class, she flies to tahiti and sells souvenirs on the beach. if this happened, the college would simply assign a substitute to finish the course. what does this tell you about the nature of the authority wielded by a professor?