How did the cotton gin lead to the. growth of slavery

Which of the following discoveries would be most likely to cause a scientific paradigm shift? a. the discovery of more rings around uranus b. the discovery of a new pathogenic virus transmitted by mosquitoes c. the discovery that a dormant volcano is showing signs of activity d. the discovery of a new species of salamander in the amazon rainforest e. the discovery that excess heat is radiating from the center of the earth and causing global climate change

Why does the united states constitution require that a national census be taken every ten years?

Which was an important long-term result of the civil war? a a feeling of american nationalism developed. b. industrialism increased in the south. c. differences between social classes declined.