Before revision: Choice of metaphor: tree, a net, cobweb, or ring In his article Uprooting the Tree of Life, W. Ford Doolittle discusses the Last Universal Common Ancestor – the root of the Tree of Life – and the problems with that concept posed by HGT.
After revision: Choice of Metaphor: Tree, Net, Cobweb, or Ring In his article Uprooting the Tree of Life, W. Ford Doolittle discusses the Last Universal Common Ancestor – the root of the Tree of Life – and the problems with that concept posed by HGT.