Which of the following statements correctly compares a grassland ecosystem to a tundra ecosystem? 1.They are both located in the southeastern United States. However, tundra has more trees than grasslands. 2.They are both located in the midwestern United States. However, grasslands receive more rainfall than tundra. 3.They both have a lack of rainfall. However, grasslands are found in the midwestern United States and tundra is found in the southwestern United States. 4. They both have a lack of trees. However, grasslands are found in the midwestern United States and tundra is found in the northernmost region of the United States.

Why do you have to ask such hard questions.

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.