What is a positive externality?(1 point) Positive externalities occur when a service is available without cost. Positive externalities occur when a service is available without cost. Positive externalities occur whenever there is a private benefit to a good or service. Positive externalities occur whenever there is a private benefit to a good or service. Positive externalities occur when there is both a social benefit and private benefit from a good or service. Positive externalities occur when there is both a social benefit and private benefit from a good or service. Positive externalities occur whenever there is a social benefit to a good or service.

abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.

genetics is the study of how dna works, the methodologies defining the new recent technologies allow scientist to have a panoramic view of the entire dna landscape, especially how genomes interact with their environment, including off course, factors outside their organisms.

thus is very possible the existence of both scenarios, where populations of isolated individuals have different genetic traits, and share traits related to genetic mutation, due rats can easily travel overseas using human transport channels. so scientists could get a vast number of data, including human interaction, evolution of rodents, health development, spread of infections, development of new organisms, how genomes evolve in different environments and so on.

“a committee reviews the bill and marks it up to make it more viable and to reflect interests