Which statement accurately describes the importance of christopher
columbus?
o
a. his voyage inspired european powers to begin exploring,
conquering, and colonizing the aphericas.
b. his voyage provided the first piece of evidence that the world was
round
c. his voyage demonstrated that europeans could sail directly west
to reach india
d. his voyage proved that european scientists had incorrectly
calculated the size of the globe.

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?