Atheta wave is a type of select one: a. brain wave associated with critical thinking b. brain wave associated with sleep spindles c. low frequency, high amplitude brain wave d. low frequency, low amplitude brain wave

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.

the fossil record provides evidence of a common ancestor to many species.