Two populations of a species of flightless bird became separated by a river and the birds became two different species. How would scientists be able to discover that the two species of birds share a common ancestor? Scientists can look for similarities in -

Responses

body coverings.
body coverings.

genetic similarities.
genetic similarities.

food choices.
food choices.

mating rituals.

body coverings, genetic similarities, food choices, and mating rituals.