1.
2.
3.
Interpret Tables Which domains have
unbranched lipids in their cell membranes
Interpret Tables Which domain has just one type
of RNA polymerase
Analyze Data On the basis of this table, how are
archaea different from bacteria
CH 18 CLASSIFICATION
18.3 Building the Tree of Life
Six-Kingdom System of Classification
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Eubacteria
Archaebacteria
Protista
Fungi
Plantae
Animalia.
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Number of kingdoms has changed and varies
depending on source
Started off as plant or animal.
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
Five kingdoms was very common
Broke bacteria up into two kingdoms.
Domain


Larger, more inclusive category than a kingdom
Three Domains
 Bacteria
(Eubacteria)
 Archaea (Archaebacteria)
 Eukarya (all eukaryotes.
The Tree of All Life

Shows current hypotheses regarding evolutionary
relationships among the taxa.
Domain Bacteria

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
Eubacteria
Thick, rigid walls containing peptidogylcan
Very, very diverse.
Domain Archaea




Archaebacteria
Live in some extreme environments
Lack peptidoglycan
Cell membranes contain unusual lipids that are not
found in any other organism.
Domain Eukarya


Have nucleus
Protista, Fungi, Plantae, and Animalia.
Protista

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The remaining eukaryotes
Unicellular or multicellular
Microscopic or much larger (10 m)
Producer, consumer, or decomposer
Algae, protozoa, slime molds.
Fungi





Develop directly from spores
Many are decomposers
Multicellular with chitin cell wall
yeast)
Either sexual or asexual reproduction
Mainly haploid.
(except
Plantae





Develop from embryo that lacks blastula
Cell wall of cellulose
Chloroplast
Stores starch
Mostly sexual reproduction.
Animalia






Develop from embryo WITH blastula stage
Heterotrophic
Multicellular
Microscopic to huge
Many have nervous system
Mostly sexual reproduction.

1.
2.
3.
Use the data on the chart on Page 439
Interpret Tables Which kingdoms has cells that
lack cell walls
Interpret Tables Which domain contains
multicellular organisms
Compare and Contrast On the basis of
information in the table, how are the members of
domain Archaea similar to Bacteria? How are
Archaea similar to Eukarya