Help please :) I don’t really get it

5elections for representatives to the u. s. house of representatives are held every two years. elections take place in november, and there is usually one republican candidate and one democratic candidate on the ballot. how are candidates chosen to appear on the ballot?

Which kind of organism is a heterotroph?

Before tuberculosis was understood to be a communicable disease, and before the discovery of antibiotics to treat it, a major outbreak could kill or cripple a significant portion of a nation’s labor force. how would such an event affect the economy? illustrate the effect by dragging to shift either the aggregate demand curve or the long-run aggregate supply curve.