why mules cannot be considered as species ?
Why donkey and horse can not be considered as single
Species though they have an offspring?
Which one of the following is the correct statement about the respective animal(s)?
(a) Donkey and horse should be considered one single species because they can successfully mate and produce an offspring.
(b) Donkey and horse are two different genera.
(c) Mule is a separate species.
(d) Mule is neither a donkey nor a horse.