The introduction of new genes into the gene pool of a population occurs through the process of

Write the function getkthdigit(n, k) that takes a possibly-negative int n and a non-negative int k, and returns the kth digit of n, starting from 0, counting from the right

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?

Explain why you think this diagram shows what happened to the carbon in the biodome.