Which system is responsible for the exchange of oxygen and carbon dioxide? respiratory endocrine skeletal circulatory

The large connected urbane area from boston to washington, d.c. is often referred to as

What was the most difficult obstacle to overcome in the creation of an autonomous state after indian independence was achieved? a british willingness to go to war to retain the region b. religious differences between hindus and muslims c. ethnic differences between tribal regions d. indian princes' inability to decide on a format of government

Asap! ! ! western china, northern china and southeastern mongolia are all located in what climate zone? tropical wetdesert humid subtropical humid continental