What was Jean-Jacques Rousseau's contribution to the Enlightenment during the 17th century?
A. His ideas on the social contract emphasized the importance of the
general will of the people.
B. He pointed out that absolute monarchs could control the
selfishness of the people.
C. His theory of separation of powers formed the basis for France's
new government.
D. He encouraged people to follow the laws of God rather than the
laws of kings.

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?