8. How did the introduction of infectious diseases to the New World impact the development of labor systems in European settlements?
A) It was no longer considered safe for indentured servants to migrate to the New World from Europe.
B) The Spanish encomienda system began to rely on free laborers from Europe.
C) Native Americans were never utilized by Europeans as a labor source due to their small population and weakness to
disease.
D) It led to the use of African slaves as a labor source because they shared immunities with Europeans.

Apopulation is a group of individuals of a single species existing together in an area. a population’s range, the area it occupies, changes over time. populations, in turn, may form a network, or metapopulation, connected by individuals that move from one group to another. within a population, the distribution of individuals can be random, uniform, or clumped, and the distribution is determined in part by the availability of resources. how might the geographic range of a species change if populations could not exchange individuals with each other? how would your answer depend on what type of metapopulation existed?

Which term describes a possible explanation of, or answer to, a scientific question that is based on prior knowledge or research and that is testable?

Why are the majority of the world's economies mixed? what may happen to the "pure" types of economies (traditional, socialist/command, market capitalist) when they incorporate elements from other economic models?