Theoretically, random mutations can accumulate enough to generate different species even when there are no distinction in the selective pressures experienced by the two populations.
Vanhu lava pfumelaka eka dyondzo ya ku tihundzukela ka swilo va nga ha hlamarisiwa hi ndlela leyi vanhu va nga ni vuswikoti byo hambanisa mihlovo yo hambana-hambana, hambileswi vuswikoti byebyo byi nga pfuniki munhu leswaku a hanya.