To understand speciation, the meaning of species should be clear first. Species is the smallest unit in the hierarchy of classification of organisms. It is a group of organisms that share a genetic heritage; are able to interbreed and create fertile offspring. Two different species are separated from each other by reproductive barriers. In simple words, speciation is the process of formation of species. It is a process within evolution that leads to formation of new reproductively isolated distinct species. These new species evolve by genetic modifications, accumulation of variations over a long period of time. For example, Tiger (Panthera tigris) and Lion (Panthera leo) are two different species within a genus.
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