How did the collapse of communism in neighboring countries contribute to the fall of the Berlin Wall? People in East Berlin were inspired to push for change.
People in West Berlin were willing to take military action.
People in East Berlin were pressured to vote for new leaders.
People in West Berlin were ready to compromise with the communists.

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?