The answer is speciation. It could have been caused by the separation
of the two populations by a geographical feature such as a wide river (hence causing allopatric speciation) or could
have been caused by behavioral isolation
between the two population (hence causing sympatric
speciation).
The binomial nomenclature taxonomic system is still used today because
it is a universal system.
<h3>What is Binomial nomenclature?</h3>
This is a two-term naming system using Latin forms in which organisms are
grouped. This system contains only the genus and species of the
organism.
It does not always reflect evolutionary relationships between organisms
but is widely used because it helps to classify a very large percentage of
Earths biodiversity.
Read more about Binomial nomenclature here brainly.com/question/9837065
