18.3 – Building the Tree of Life 18.3 – Building the Tree of Life Chapter 18 – Classification 18.3 Building the Tree of Life18.3 Building the Tree of Life

18.3 – Building the Tree of Life 18.3 – Building the Tree of Life Three Domains 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

18.3 – Building the Tree of Life 18.3 – Building the Tree of Life 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

18.3 – Building the Tree of Life 18.3 – Building the Tree of Life Domain Bacteria Members of the domain Bacteria are:

Unicellular Prokaryotic Different cell structures than Domain Archaea Corresponds to the kingdom Eubacteria

18.3 – Building the Tree of Life 18.3 – Building the Tree of Life Domain Eukarya The domain Eukarya consists of all organisms that:

Are eukaryotic (have a nucleus) Includes the kingdoms Protista, Fungi, Plantae, and Animalia.

18.3 – Building the Tree of Life 18.3 – Building the Tree of Life Three Domains

18.3 – Building the Tree of Life 18.3 – Building the Tree of Life Modern Day Kingdoms Six Kingdom system of classification:

Eubacteria,ArchaeabacteriaProtistaFungiPlantaeAnimalia

Two kingdom system during Linnaeus's time! Plant or Animal

18.3 – Building the Tree of Life 18.3 – Building the Tree of Life Changing Ideas About Kingdoms Kingdoms have changes quite a bit overtime.

18.3 – Building the Tree of Life 18.3 – Building the Tree of Life 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

18.3 – Building the Tree of Life 18.3 – Building the Tree of Life 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.

18.3 – Building the Tree of Life 18.3 – Building the Tree of Life 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.

18.3 – Building the Tree of Life 18.3 – Building the Tree of Life The Tree of All Life