This phylogenetic diagram shows hypotheses of the evolutionary relationships between all major groups of living organisms. Scientists are uncertain about some of these groupings. Dashed lines indicate relationships that are very uncertain or strongly debated. For updates on phylogenetic information, visit go.hrw.com and type in the keyword HM6 Phylo.

Eubacteria (bacteria)

Archaebacteria (archaea)

Protista (protists)

Bryophyta (mosses)-

% Coniferophyta (conifers)

Pteridophyta (ferns)


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