The standard definition of a species as a group of individuals capable of interbreeding does not apply to bacteria because A. Not possible to distinguish morphologically because of their tiny size B. They do not have sexual reproduction C. They mutate very fast D. They out breed frequently

National time zones were created by ____________________ in 1883.

The ____________________ allowed voters to directly express their opinions about legislation.

In response to post-Civil War rapid industrialization and its accompanying loss of independence, in 1866 skilled artisans formed the

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

At the start of World War I, Armenia, Palestine, Mesopotamia, and Syria had all been part of the ____________________ Empire.

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

Rural Americans in the 1920s

The human eye is most sensitive to visible light (0.4 – 0.7 µm) because

The figure below shows that 400,000 years ago, CO2 concentrations were about ______ and temperatures were ______ than usual: