Which of the following statements about natural selection is true

What is the role of buyer & seller in the marketplace

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?

What are the most populous and least populous areas of russia? and why are some areas more heavily populated than others?