This volume is based on the National Academy of Sciences' Colloquium on the Tempo and Mode of Evolution. The articles appearing in these pages were contributed by speakers at the colloquium and have ...

Tempo, mode, the progenote, and the universal root / W. Ford Doolittle and James R. Brown -- Phylogeny from function : the origin of tRNA is in replication, not translation / Nancy Maizels and Alan M.