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Which effect does an increase in a country’s literacy rate have on the people who live there?

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

Which term describes a possible explanation of, or answer to, a scientific question that is based on prior knowledge or research and that is testable?