TEKS 6.12C recognize the broadest taxonomic classification of living organisms is divided into currently
recognized Domains
TEKS 6.12D identify the basic characteristics of organisms, including prokaryotic or eukaryotic,
unicellular or multi-cellular, autotrophic or heterotrophic, and mode of reproduction, that further classify
them in the currently recognized Kingdoms
•What
is one reason people group things into
categories?
•What
characteristics do you think scientists
look at when classifying organisms?
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Taxonomy is the science of classifying
and naming organisms.
A taxonomist is a scientist who
classifies or names organisms.
•Prokaryotic
•Eukaryotic
•Sexual
reproduction
•Asexual
reproduction
•Multi-cellular
•Unicellular
•Autotrophic
•Heterotrophic
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The following slides review the
characteristics of each of the three
domains and six kingdoms.
Living organisms
Prokaryotic cells
Important characteristics
Eukaryotic cells
Domain Eukarya
Domain bacteria
Domain Archaea
Kingdom
Plantae
Kingdom
Eubacteria
Kingdom
Archaebacteria
Kingdom
Fungi
Kingdom
Protista
Kingdom
Animalia
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Prokaryotic – lack a nucleus
Unicellular – single celled
Some autotrophic, some heterotrophic
Reproduce asexually
Some live in extreme environments
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High salinity (salt content)
Low oxygen concentrations
High temperatures
High or low pH
Guts of grazing herbivores- produce methane
Many live in oceans
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Prokaryotic – lack a nucleus
Unicellular – single celled
Some autotrophic, some heterotrophic
Reproduce asexually
Used in food production, oil spill cleanup,
and sewage treatment plants
Decomposers – break down dead organisms
Some cause disease – strep throat, food
poisioning, etc.
http://biodidac.bio.uottawa.ca/
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Eukaryotic – have a nucleus
Most unicellular, some multi-cellular
Some autotrophic, some heterotrophic
Reproduction can be asexual or sexual
Examples: amoeba, paramecium, algae,
diatoms, and many more
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Eukaryotic – have a nucleus
Some unicellular, most multi-cellular
Heterotrophic
Reproduction can be asexual or sexual
Many are decomposers
Examples: mold, mushrooms, yeast
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Eukaryotic – have a nucleus
Multi-cellular
Almost all are autotrophic
Reproduce sexually and asexually
Most need sunlight, water, minerals and
carbon dioxide to survive
Examples: trees, grasses, mosses, ferns,
cactus, etc.
http://biodidac.bio.uottawa.ca/
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Eukaryotic – have a nucleus
Multi-cellular
Heterotrophic
Most reproduce sexually but some asexually
Examples: lizards grasshoppers, spiders,
dogs, humans, worms, clams, fish, etc.
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An organism is eukaryotic,
multicellular and heterotrophic. In
which of the kingdoms would you
place this organism?
Fungi or animal