Artificial selection. These vegetables have all been selected from one
   species of wild cabbage.
   By  selecting  variations  in  different  parts  of  the plant, humans
   managed to breed divergent <A ClAsS=MIZ Href="../../..//med/artificial_selection_pigeons.html" oNClick="popurlts('../../..//med/artificial_selection_pigeons.html',780,526);txtcolor('artificial_selection1','gray');return false;" Id=artificial_selection1 ClAsS=MIZ>varieties.</A>