Biology Lab Safety Rules. Biology lab safety rules are guidelines designed to help keep you safe when experimenting. Some equipment and chemicals in a biology laboratory can cause serious harm. It is always wise to follow all lab safety rules. Don't forget, the most helpful safety rule is to use plain old common sense.
In 1937 statehood for Hawaii was proposed and refused by the U.S. Congressâthe territory's mixed population and distance from the U.S. mainland were among the obstacles. On Dec. 7, 1941, Japanese aircraft made a surprise attack on Pearl Harbor, plunging the United States into World War II.
When Germany stood by its ally and declared war on the United States, the Roosevelt Administration faced war in both Europe and Asia. 1  1937â1945: Diplomacy and the Road to Another War.  Japan, China, the United States and the Road to Pearl Harbor, 1937â41. Between 1937 and 1941, escalating conflict between China and Japan influenced U.S. relations with both nations, and ultimately contributed to pushing the United States toward full-scale war with Japan and Germany.