Speciation

Morphologically

if they appear identical physically

Biologically

interbreeding and producing fertile offspring

Evolutionary

Interbreeding groups are reproductively isolated and evolve separately from each other

Speciation

When new biological species are created

Alopatric Speciation

Popukations of species become isolated due to geographic separation

Sympatric Speciation

Two separate species evolve even thought they share the same geographic rea

Adaptive Radiation

Single species evolve into multiple diffrent but closely related species