Observed and predicted growth rates by strain.

<p>Observed square root growth rate data are shown as circles and are standardized by dividing by the maximum for each strain. Fitted curves are shown as lines. Strain numbering is given in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0032003#pone.0032003.s007" target="_blank">Table S1</a>. Bacterial strains are shown as green circles, archaeal strains as blue squares, and eukaryote strains as red diamonds.