Look at the vocabulary words below. They can be sorted into four groups of words that are have something in common with each other. How would you sort the words, and what headings would you give each category? Each group must have its own heading. railroads Kansas-Nebraska Act Cherokee annexation

Missouri Compromise Andrew Jackson canals Indian Removal Act

roads Manifest Destiny Compromise of 1850

Mexican-American War Southern farmers Republic of Texas

The constant presence of diseases or infectious agents within a given geographic area or population group. it may also refer to the usual prevalence of a given disease with such area or group. it includes holoendemic and hyperendemic diseases. a holoendemic disease is one for which a high prevalent level of infection begins early in life and affects most of the child population, leading to a state of equilibrium such that the adult population shows evidence of the disease much less commonly than do children (malaria in many communities is a holoendemic disease). a hyperendemic disease is one that is constantly present at a high incidence and/or prevalence rate and affects all groups equally. so probably family history.