Why did organized labor in the 1880s oppose an increase in the number of immigrants allowed to enter the united states? a. they believed that immigrants would soon return to their homelands. b. immigrants often took jobs for low pay, lowering wages for everybody else. c. immigrants often took higher paying jobs away from union members. d. there was not enough work in factories to support more immigrant workers.

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?

Louisiana purchase timeline can someone give me the answers, it's due tomorrow.

What us state was once an independent nation?