Chapter 17.3- Domains and Kingdoms

Changing Number of Kingdoms

Kingdoms and Domains: Scientists debate how many kingdoms there are.

Bacteria Archaea Eukarya

Bacteria Archaea Protista Plantae Fungi Animalia

Monera Protista Plantae Fungi Animalia

The three-domain system

The six-kingdom system

The traditional five-kingdom system

BioEd Online

Domains There are 3 Domains Bacteria- cells contain cell walls with

Peptidoglycan (polymer that has 2 kings of sugar).

Archaea- cells contain cell walls without Peptidoglycan.

Eukarya- contains Eukaryotic cells. Contains the Kingdoms Protista, Fungi, Plantae and Animalia

Kingdom Bacteria

• Unicellular and prokaryotic

Kingdom Archaea

• Unicellular and Prokaryotic

• Live in some of the most extreme environments you can imagine

Kingdom ProtistaEukaryotic organisms that can be unicellular or multicellular. Has no organs.

Ex: plant like protist = algae

Ex: animal like protist = protozoans

Ex: fungus like protist = molds & mildews

Kingdom Fungi

Unicellular or Multicellular Eukaryotes that absorbs nutrients (heterotrophs).

Contains chitin

Ex: Mushrooms

Kingdom Plantae

Multicellular Eukaryotes that are autotrophs. Contains cellulose

Kingdom Animalia

Multicellular Eukaryotes that are heterotrophs. Has no cell wall.

DOMAIN

KINGDOM

CELL TYPE

CELL STRUCTURES

NUMBER OF CELLS

MODE OF NUTRITION

EXAMPLES

Bacteria

Eubacteria

Prokaryote

Cell walls with peptidoglycan

Unicellular

Autotroph or heterotroph

Streptococcus, Escherichia coli

Archaea

Archaebacteria

Prokaryote

Cell walls without peptidoglycan

Unicellular

Autotroph or heterotroph

Methanogens, halophiles

Protista

Eukaryote

Cell walls of cellulose in some; some have chloroplasts

Most unicellular; some colonial; some multicellular

Autotroph or heterotroph

Amoeba, Paramecium, slime molds, giant kelp

Fungi

Eukaryote

Cell walls of chitin

Most multicellular; some unicellular

Heterotroph

Mushrooms, yeasts

Plantae

Eukaryote

Cell walls of cellulose; chloroplasts

Multicellular

Autotroph

Mosses, ferns, flowering plants

Animalia

Eukaryote

No cell walls or chloroplasts

Multicellular

Heterotroph

Sponges, worms, insects, fishes, mammals

Eukarya