Image: Three Kingdoms of Life
sequence analyses of the 16 S ribosomal RNA gene, which is contained in all
Earthly organisms, it is possible to construct a molecular phylogeny that can
quantitatively compare all organisms, even those that can not be cultivated in
the laboratory. Such an approach
has yielded quite a different view of life, as shown here, in which the major
kingdoms of life (animals, plants, fungi, and protists) shown in Figure 3, are
grouped into one kingdom, and the prokaryotes are expanded into two kingdoms,
called the Archaea and the Bacteria.
|To return to the previous
topic, click on your browser's 'Back' button.