LESS THAN RARE. “Symbiotic alliances making up collective Darwinian individuals are also not infrequently formed between multicellular eukaryotic partners.”
http://www.pnas.org/content/112/33/10278.full
LESS THAN RARE. “Symbiotic alliances making up collective Darwinian individuals are also not infrequently formed between multicellular eukaryotic partners.”
http://www.pnas.org/content/112/33/10278.full