SELECTION LEVEL. “The evolution of multicellularity requires an increasing role for natural selection among multicellular individuals, relative to selection among cells within individuals.”
http://www.pnas.org/content/109/5/1595.full
SELECTION LEVEL. “The evolution of multicellularity requires an increasing role for natural selection among multicellular individuals, relative to selection among cells within individuals.”
http://www.pnas.org/content/109/5/1595.full