Most of the plants that we think are delicious have actually been artificially selected for hundreds or even thousands of years
The existence of reproductive isolation, so that these situations can not occur, even if there are some individuals of different species sometimes complete the mating, but they generally can not produce offspring, or produce offspring can not continue to reproduce
The hermaphroditic characteristics of the spotted hyena are completely opposite to those of humans, so is the social system of the spotted hyena also opposite?