Eubacteria Eubacterium


The Six Kingdoms

When Linnaeus developed his
system of classification, there were only two kingdoms, Plants and Animals. But the use
of the microscope led to the discovery of new organisms and the
identification of differences in cells.
A two-kingdom system was no
longer useful.


Today the system of
classification includes six kingdoms.




The Six Kingdoms:

Plants, Animals, Protists, Fungi, Archaebacteria,


Plants and Animals

How are organism placed into their kingdoms?

Cell type,
complex or simple

Their ability to
make food

The number of
cells in their body


You are probably quite
familiar with the members of this kingdom as it contains all the plants that
you have come to know – flowering plants , mosses,
and ferns.Plants are all multicellular and consist of complex



In addition plants are autotrophs,
organisms that make their own food.



With over 250,000 species,
the plant kingdom is the second largest kingdom.Plant species range from the tiny
green mosses to giant trees.

plants, life on Earth would not exist!
Plants feed almost all the heterotrophs (organisms that eat other
organisms) on Earth.Wow!



The animal
kingdom is the largest kingdom with over 1 million known species.


Sumatran Tiger

Sumatran Tiger
��� Kingdom: Animalia, Phylum,
Chordata, Class Mammalia, Order Carnivora, Family Felidae, Genus Pathera, Species tigris


Robin Eating a Berry


All animals consist of many
complex cells. They are also heterotrophs.


Members of the animal kingdom are found in the most
diverse environments in the world.


In 1983, scientists tool
samples from a spot deep in the
Pacific Ocean
where hot gases and molten rock boiled into the ocean form the Earth�s
interior.To their surprise they
discovered unicellular (one cell) organisms in the samples. These
organisms are today classified in the kingdom, Archaebacteria.


Archaebacteria are
found in extreme environments such as hot boiling water and thermal
vents under conditions with no oxygen or highly acid environments.


The hot
of Yellowstone
National Park
, were
among the first places Archaebacteria were discovered. The biologists pictured
above are immersing microscope slides in the boiling pool onto which some
archaebacteria might be captured for study.



Like archaebacteria, eubacteria are complex
and single celled.
Most bacteria are in the EUBACTERIA
kingdom. They are the kinds found everywhere and are the ones people are most
familiar with.


Salmonella enteriditis


Eubacteria are classified in
their own kingdom because their chemical makeup is different.

eubacteria are helpful.Some produce
vitamins and foods like yogurt.
However, these eubacteria, Streptococci pictured above, can give you
strep throat!


Mushrooms, mold and mildew
are all examples of organisms in the kingdom fungi .


Most fungi are multicellular and consists of many complex cells.


Fun Facts about

short description of image


Some fungi taste great and others can kill you!


Fungi are organisms that biologists once confused
with plants, however, unlike plants,
fungi cannot make their own food.
Most obtain their food from parts of plants that are decaying in the



Slime molds and algae are

Sometimes they are called
the odds and ends kingdom because its members are so different from one
another. Protists
include all microscopic organisms that are not bacteria, not
animals, not plants and not fungi.




Most protists
are unicellular. You may be
wondering why those protists are not classified in the Archaebacteria or
Eubacteria kingdoms.


It is because, unlike
bacteria, protists are complex cells.


These delicate looking diatoms are classified in the
protist kingdom.


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