18-3 Two Modern Systems of
Classification
kingdom
cell type
Archaebacteria pro.
Eubacteria
pro.
Protista
euk.
Fungi
euk.
Plantae
euk.
Animalia
euk.
no. of cells
uni.
uni.
both
both
multi.
multi.
nutrition
both
both
both
hetero.
auto.
(some hetero)
hetero.
Prokaryotic = pro.
Eukaryotic = euk.
Unicellular = uni.
Multicellular = multi.
Heterotrophy = hetero.
Autotrophy = auto.
1. Kingdom Archaebacteria
 “Ancient bacteria”
chemosynthetic bacteria.
 Live in harsh
environments: sulfurous
hot springs, very salty
lakes, intestines of
mammals.
 Resembles first kinds of
organisms to live on
Earth.
2. Kingdom Eubacteria
 “True bacteria” use oxygen.
Do not live in harsh
environments.
Cause tooth decay, milk to
turn into yogurt, food
poisoning, other disease
causing bacteria.
Along with kingdom
archaebacteria, these include
greatest number of living
things on Earth.
3. Kingdom Protista
 Mostly unicellular
 Giant kelp is
multicellular but it lacks
specialized tissues
(which plants have)
 50,000 species
euglena, amoeba,
paramecium and algae
4. Kingdom Fungi
 Absorb nutrients (do
not ingest)
 100,000 species
 mushrooms,
puffballs, molds,
mildews, rusts and
smuts
5. Kingdom Plantae
 Most
photosynthesize
 Most on land
 350,000 species
mosses, ferns,
conifers and
flowering plants
6. Kingdom Animalia
 Symmetrical
body
organization
 Move about
their environment
Humans, insects,
reptiles,
amphibians, birds
3-Domain System
Used in modern science. Based on differences of RNA.
Domain
Bacteria
Archaea
Eukarya
Kingdom
Eubacteria
Archaebacteria
Protists
Fungi
Plantae
Animalia