Membrane-bound
organelles ABSENT
•
•
•
Nuclear membrane
ABSENT around
genetic material
ALL CELLS
Cell membrane present
Genetic material present - DNA
Ribosomes present
1st way to split living things – contents of their cells
Nuclear membrane
PRESENT &
surrounds genetic
material
Membrane-bound
organelles present
1
Life classified into 3 Domains
Living Things
Domain
Bacteria
Domain
Archaea
Domain
Eukarya
2
From
Domains
to
Kingdoms
3
Domain - ARCHAEA
• Kingdom - ARCHAEBACTERIA
• Probably the 1 cells to evolve
• Live in HARSH environments
• Found in:
st
–Sewage Treatment Plants (Methanogens)
–Thermal or Volcanic Vents (Thermophiles)
–Hot Springs or Geysers that are acidic
–Very salty water (Dead Sea; Great Salt
Lake) - Halophiles
4
ARCHAEAN
Thermus
aquaticus
5
Domain BACTERIA
• Kingdom - EUBACTERIA
• Found in ALL HABITATS except harsh ones
• Many beneficial
•Important decomposers for environment
•Commercially important in making cottage
cheese, yogurt, buttermilk, etc.
•Give nitrogen to plants
•E.coli – gut flora
• Some may cause DISEASE
(pathogenic)
6
Live in the intestines of animals
7
Domain Eukarya is Divided
into 4 Kingdoms
•Protista
•Fungi
•Plantae
•Animalia
8
Domain Eukarya, Kingdom - Protista
• Most are unicellular
• Some are multicellular (but
no true tissues)
• Some are autotrophic,
others are heterotrophic
• Some have cell walls,
others do not
• Plant-like = algae &
phytoplankton
• Animal-like = protozoans
• Fungi-like = slime molds
9
Domain Eukarya, Kingdom -
• Multicellular, except
yeast
• Absorptive
Fungi
heterotrophs (digest
food outside their body &
then absorb it)
• Cell walls made of
chitin
10
Domain Eukarya, Kingdom -
Plantae
•Multicellular (with
true tissues & division
of labor)
•Autotrophic
• Absorb sunlight to make
glucose – Photosynthesis
•Cell walls made of
cellulose
11
Domain Eukarya, Kingdom - Animalia
• Multicellular (with true
tissues & division of labor)
• Ingestive heterotrophs –
EAT
• (consume food & digest it inside their
• No cell walls
bodies)
12
What does this information look like
in a table?
13