"Darwin's finches" reside on the Galapagos Islands. Each species has a different type of beak, however, they can all be
traced back to one common ancestor. The different beaks are an example of
adaptations
genes
reproductive organs
speciation

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