1. Phylogeny and the Tree of Life
Chapter 26
Phylogeny and the Tree of Life

2. Phylogeny is the evolutionary history of a species or group of related species
Phylogenies show evolutionary relationships
© 2011 Pearson Education, Inc.

3. Figure 26.2
Figure 26.2 An unexpected family tree.

4. Binomial Nomenclature
Lumbricus terrestris
Panthera leo
Canis lupis
Canis domesticus
© 2011 Pearson Education, Inc.

5. Species: Panthera pardus Genus: Panthera Family: Felidae Order:
Figure 26.3
Species:
Panthera pardus
Genus:
Panthera
Family:
Felidae
Order:
Carnivora
Class:
Mammalia
Figure 26.3 Linnaean classification.
Phylum:
Chordata
Kingdom:
Animalia
Domain:
Bacteria
Domain:
Archaea
Domain:
Eukarya

6. Order Family Genus Species Panthera pardus (leopard) Felidae Panthera
Figure 26.4
Order
Family
Genus
Species
Panthera
pardus
(leopard)
Felidae
Panthera
Taxidea
taxus
(American
badger)
Taxidea
Carnivora
Mustelidae
Lutra lutra
(European
otter)
Lutra
Figure 26.4 The connection between classification and phylogeny.
Canis
latrans
(coyote)
Canidae
Canis
Canis
lupus
(gray wolf)

7. From Two Kingdoms to Three Domains
The tree of life suggests that eukaryotes and archaea are more closely related to each other than to bacteria
© 2011 Pearson Education, Inc.

8. Eukarya Bacteria Archaea Figure 26.21
Land plants
Dinoflagellates
Green algae
Forams
Ciliates
Diatoms
Red algae
Amoebas
Cellular slime molds
Euglena
Trypanosomes
Animals
Leishmania
Fungi
Sulfolobus
Green
nonsulfur bacteria
Thermophiles
(Mitochondrion)
Figure The three domains of life.
Spirochetes
Halophiles
Chlamydia
COMMON
ANCESTOR
OF ALL
LIFE
Green
sulfur bacteria
Bacteria
Methanobacterium
Cyanobacteria
Archaea
(Plastids, including
chloroplasts)