3. explain how organisms use chemical energy to drive basic life functions.

Well chemical energy can come from the sun so an organisim can use this energy to grow and create more life, for example producers which are plants need the sun to grow, then consumers need plants to eat. It basically helps the circle of life

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