1. Chapter 18 – Classification
18.3 Building the Tree of Life

2. Three Domains Three Domains Bacteria Archaea Eukarya Prokaryotic
DNA evidence proved that bacteria and archaea are very different so scientists created domains.
Domains are a larger more inclusive taxon than a kingdom.
Three domains of life –
Three Domains
Bacteria
Archaea
Eukarya
Prokaryotic
Eukaryotic

3. Domain Archaea Members of the domain Archaea are:
unicellular and prokaryotic
live in extreme environments
Different cell structures than domain
Bacteria
Corresponds to the kingdom Archeabacteria

4. Domain Bacteria Members of the domain Bacteria are: Unicellular
Prokaryotic
Different cell structures than Domain Archaea
Corresponds to the kingdom Eubacteria

5. Domain Eukarya The domain Eukarya consists of all organisms that:
Are eukaryotic (have a nucleus)
Includes the kingdoms Protista, Fungi, Plantae, and Animalia.

6. Three Domains

7. Modern Day Kingdoms Six Kingdom system of classification: Eubacteria,
Archaeabacteria
Protista
Fungi
Plantae
Animalia
Two kingdom system during Linnaeus's time!
Plant or Animal

8. Changing Ideas About Kingdoms
Kingdoms have changes quite a bit overtime.

9. 3 Domains and 6 Kindgoms
Draw a simple concept map that shows the 3 domains and 6 kingdoms that are currently used in biological classification

10. The Tree of All Life
The tree of life represents the current hypotheses regarding evolutionary relationships among the taxa within the three domains of life.

11. The Tree of All Life
Modern evolutionary classification is working towards the goal of presenting all life on a single evolutionary tree.
The tree of life displays current evolutionary relationships among the taxa within the three domains of life.

12. The Tree of All Life