Answer:
A single species
Explanation:
To be useful, a scientific name has to refer to a single species.
Answer:
No, they are not. The concept of human races appears to be solidly grounded in present-day biology and our evolutionary history. But if you asked that conference of geneticists to give you a genetic definition of race, they wouldn’t be able to do it. Human races are not natural genetic groups; they are socially constructed categories. Genes certainly reflect geography, but unlike geography, human genetic differences don't fall along obvious natural boundaries that might define races.
One reason is for safety! in case you get stranded in a body of water you can keep yourself afloat
