Sleepers are least responsive to outside stimulation during sleep. stage 4stage 3stage 1stage 2

Journey stations were established throughout the mongol empire every miles.

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?

Adolescents can display egocentrism when they become about changes in their lives.