1. Kingdoms and Domains

2. Describe the three-Domain system of
Objectives
Name the six kingdoms
Describe the three-Domain system of
classification

3. Linnaeus’ original classification involved
Introduction
Linnaeus’ original classification involved
only the differences between plants and
animals
As biologists learned more about the
natural world, they realized that
Linnaeus’ two kingdoms, Animalia and
Plantae, did not represent the full
diversity of life

4. A domain is a category larger than a
Three-Domain System
A domain is a category larger than a
kingdom that is more inclusive
Three Domains:
Eukarya
Bacteria
Archaea

5. Some need oxygen, others
Domain Bacteria
Kingdom Eubacteria
Unicellular and prokaryotic
Some absorb food, others
can photosynthesize
Have cell walls that contain a
substance called
peptidoglycan
Some need oxygen, others
are killed by oxygen

6. Domain Archaea Kingdom Archaebacteria Unicellular and prokaryotic
Some can absorb food, others can
photosynthesize
Have cell walls that do not contain the
substance peptidoglycan
Most survive only where there is no
oxygen
Cell membranes contain lipids not
found in any other organism
Survive in extreme environments such
as volcanic hot springs

7. All organisms are eukaryotic (cells
Domain Eukarya
All organisms are eukaryotic (cells
contain nuclei)
Kingdom Protista
Can be unicellular or multicellular
Obtain food through absorption, ingestion, or photosynthesis
Reproduce sexually or asexually
Example: algae

8. Domain Eukarya Kingdom Fungi Have rigid cell walls made of chitin
Cannot make their own food
(heterotrophic)
Absorb nutrients
Secrete digestive enzymes
into their food
Reproduce sexually or
asexually
Mostly live on land
(terrestrial)
Examples: yeast, mushroom,
mold

9. Domain Eukarya Kingdom Plantae Multicellular
Make their own food through photosynthesis
(autotrophic)
Have cell walls made of cellulose
All plants

10. Domain Eukarya Kingdom Animalia Multicellular Heterotrophic
Ingest food
Reproduce sexually; a
few can reproduce
asexually
Ex: ameobas
Contains over 1 million
different species
Examples: humans,
bears, chickens, bees,
spiders, frogs, etc.

11. Notes Review Name the six kingdoms Eubacteria Archaebacteria Protista
Fungi
Plantae
Animalia

12. Describe the three-Domain system of
Notes Review
Describe the three-Domain system of
classification
A domain is a category larger than a
kingdom that is more inclusive
Three Domains:
Eukarya
Bacteria
Archaea