上游充通大学 SHANGHAI JIAO TONG UNIVERSITY BACTERIA EUKARYA ARCHAEA Carl Woese's discovery in1977. Figure 1.3 The tree of life. Evolutionary paths from a common ancestor to modern organisms can be deduced on the basis of biochemical information.Figure 1.3 The tree of life. Carl Woese‘s discovery in 1977. Evolutionary paths from a common ancestor to modern organisms can be deduced on the basis of biochemical information