PLANTS AND ANIMALS ARE HYBRIDS, and have been so for millennia. “When two completely different organisms merge to form something new, this is called symbiogenesis. For many years, this was considered a heretical idea in biology, until (it was) discovered that mitochondria in animals and chloroplasts in plants were both originally symbiotic bacteria that had been incorporated into the larger organisms as organelles.””
”
http://suite101.com/article/horizontal-gene-transfer-and-symbiogenesis-a165326