Which type of industry provides services that require specialized skills or knowledge to be performed by professionals?
a. primary industries
b. secondary industries
c. tertiary industries
d. quaternary industries

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?

Why was frederick douglass encouraged by the dred scott decision?

How did the people of latin america come to speak the language of spanish