Which of the following is not one of the causes of the world war 1?
a. a buildup of military power in european nations.
b. the desire of european nations to remain isolated, not forging relationships with neighbors.
c. rivalries to seek and create empires in other regions for raw materials and resources.
d. strong feelings of devotion to one's nation.

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?