1. Why is it important for geneticists to test 'isolated people"?

There should always be a control group when testing with different peoples. A control group does not receive any variable/treatment. This helps the geneticists to compare the results between control group and the group that's being tested.

b. major john c. frémont led a rebellion called the bear flag revolt.

explanation:

during the bear flag revolt, from june to july 1846, a small group of american settlers in california rebelled against the mexican government and proclaimed california an independent republic. the republic was short-lived because soon after the bear flag was raised, the u.s. military began occupying california, which went on to join the union in 1850. the bear flag became the official state flag in 1911.