Which item has a function that is similar to that of a cell membrane a.) car door b.) swimming pool c.) water hose d.) airplane engine

A.) A car door since it lets people come in and get out. But, only who allows to come in. Ex: Like the members of the cells or the people entering/exiting the car.

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.