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Antoni van Leeuwenhoek was the first person in history to A. Use a magnifying glass. B. Develop a taxonomic system. C. View microorganisms and record these observations. D. Disprove spontaneous generation. E. Propose the germ theory of disease  

Bacteria which have more than ___________ similarity in their DNA sequences are considered to belong to one operational taxonomic unit (OTU)

The midterm elections of 1934 temporarily ended Democratic control over the Senate.

In August 1928, ____________________ declared that American was “nearer to the final triumph over poverty than ever before in the history of any land.”

The leader of the Knights of Labor was ____________________.

The United States still maintains ownership and control of the Panama Canal.

Booker T. Washington’s famous speech at the 1895 Atlanta Exposition

National time zones were created by ____________________ in 1883.

The dependence of Cuba’s ____________________ industry on the U.S. market helped win acceptance of the Platt Amendment.

Class distinctions in the United States widened during the Gilded Age.