If a solution process is exothermic, how does the energy required for dissolving the solute compare with the energy released?

Zoo geographic regions are characterized by the presence of specific groups of animals these regions are determined by the taxonomic or phylogenetic relationships of animals. the map shows the zoogeographic regions proposed by the naturalist alfred russel wallace in 1876. the similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between the organisms in both locations ?

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.