By the time Andrew Carnegie died he had given away 90% of his wealth 

What is progressivism?

Precambrian platforms are _____________. 

Features that were fully functional in their ancestors but are now only partly functional or serve a different function are called:

Which event did not occur in the Hadean (4.6-4.0 bya)?

What came out of the invention of central power/ electricity? 

White collar jobs created stereotypes for men such as

Which continent did NOT have glaciers during the Proterozoic? 

Name a secondary lymphoid organ.

Which innate receptor recognizes bacterial peptidoglycans in the cell cytosol?