“Evolution faces a tough dichotomy to get around if multicellularity is to evolve: cellular selection vs organismal integrity. At the single cell level, selection will favour cells that reproduce better. But if those cells are allowed to reproduce uncontrollably in a multicellular organism, they will inexorably destroy organismal integrity, and harm or kill the organism, also causing the ‘fitter’ cells to die. …”
“However, this leads to a mystery for the evolutionist: how do multicellular organisms evolve from single celled creatures when cellular selection and organism-level selection are totally contradictory to each other? The multicellular organism seeks to control the reproduction to what is needed at a higher level of organization; a single cell seeks to reproduce more than its competitors.”
Quote from Russell Grigg, Test of Faith DVD, http://creation.com/test-of-faith-dvd.
