You will now write a two- or three-paragraph journal entry describing how each of these themes applies to situations in the world today. Identify at least one current problem that fits each theme, and explain how an understanding of these themes may help with finding a solution to that problem. If possible, use examples from your own personal experience.

Some organisms have a large geographic range. for example, the norway rat lives on every continent except antarctica. a population of norway rats is the number of rats in one particular area. do you think it’s scientifically possible for a population of norway rats in north america to carry different genetic mutations than a population of norway rats in africa? do you think it’s possible that they carry some of the same mutations? what types of information can scientists learn by studying the genomes of these two populations of rats?