3 Domains of Life

1
3 Domains of Life

• Eukarya
• Bacteria,
• Archaea

2
Kingdoms
Plantae

• Linnaeus separated living organisms into two
  kingdoms Plantae and Animalia (1700s)
• Kingdom Protista was added as the microscope was
  used to identify more organisms (mid 1800s)
• Moulds and yeasts were originally classified as
  plants but they cannot make their own food so the
  kingdom of Fungi was created
• Bacteria were originally all classified as
  Monera but was more recently split into two
  kingdoms Archaebacteria and Eubacteria

Animalia
Protista
Fungi
Monera
Eubacteria
Archaebacteria
3
3 Domains of life

• Eukaryotes
• May be unicellular (only one cell) or
  multicellular
• (more about these later)

Plantae
Animalia
Eukarya
Protista
Fungi
Eubacteria
Archaebacteria
4
3 Domains of life

• True bacteria
• Prokaryotes, unicellular
• Very diverse (over 4 million)
• Only 4000 has been classified
• Asexual and sexual reproduction

Plantae
Animalia
Eukarya
Protista
Fungi
Bacteria
Eubacteria
Archaebacteria
Escherichia coli
5
3 Domains of life

• Ancient bacteria
• Prokaryotes, unicellular
• Lives in extreme environments (volcanoes, low
  oxygen, high acidity)
• Asexual reproduction

Plantae
Animalia
Eukarya
Protista
Fungi
Bacteria
Eubacteria
Archaea
Archaebacteria
Methanococcus jannaschii
6
3 Domains of life
Types of Archaea methanogens live below
swamps and sewage or in animal intestines, give
off methane halophiles love salty
environments thermoacidophiles love heat and
acid psychrophiles those that live at unusually
cold temperatures
Plantae
Animalia
Eukarya
Protista
Fungi
Bacteria
Eubacteria
Archaea
Archaebacteria
7
Classify each of these diseases by the type of
organism that causes them. Bacteria Fungus
Protist Virus Other

• 1. Strep throat 4. Cold Sores
• Pink Eye 5. Flu
• Athlete's Foot 6. Mad Cow

8
Strep throat
Streptococus bacteria
9
Pink Eye
Viral Conjunctivitis
10
Athletes Foot
Fungus
11
Cold Sores
Herpes simplex virus
12
Flu
Influenza virus
13
Mad Cow
bovine spongiform encephalopathy (BSE) - Prion
14
Which animals are most closely related?
15
Same Domain
Eukarya
Same Kingdom
Animalia
Same Phylum
Chordata (have a backbone)
Class
Aves
Reptilia
Amphibia
Osteichthyes
Mammalia
16
HWK Complete Kingdoms Overview sheet with help
from the text pg 27. Answer Questions 1-3 pg 29.