(Solved): According to the biological species concept, how can we know that horses and donkeys are separate ...

According to the biological species concept, how can we know that horses and donkeys are separate specles? Because borses and donkeys cannot produce offspring together. They are not separate species because they can reproduce and have mule bables. The offspring of borses and donkeys, called mules, cannot produce offspring, thus horses and donkeys are two separate species. Horses and donkeys have different morphological traits, thus they are separate species.