What’s ocean borders china in the east

What policy did "jim crow" laws put in place? black codes integration segregation 2. the supreme court case that established the doctrine of "separate but equal" was dred scott v. sandford plessy v. ferguson brown v. board of education 3. the supreme court case that overturned the doctrine of "separate but equal" wasdred scott v. sandford plessy v. ferguson brown v. board of education

What are the most populous and least areas of russia and why are some areas more heavily populated than others

What are the most populous and least populous areas of russia? and why are some areas more heavily populated than others?