what characteristic of the species level of organization distinguishes two similar organisms such as ducks…

what characteristic of the species level of organization distinguishes two similar organisms such as ducks and geese as different species?

what characteristic of the species level of organization distinguishes two similar organisms such as ducks and geese as different species?

Answer

Brief Explanations:

The biological species concept defines species as groups of inter - breeding natural populations that are reproductively isolated from other such groups. Ducks and geese cannot inter - breed successfully to produce fertile offspring, which is a key characteristic of being different species.

Answer:

They are reproductively isolated (cannot inter - breed to produce fertile offspring).