Kingdom Eubacteria
Domain Bacteria





What are the characteristics of organisms in




Did you know….

There are more bacteria living inside your mouth than there are people living on earth.




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Quick Review


In the the three-domain system of classification, all known organisms belong to one of three domains:

Bacteria, Archaea and Eukarya.

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Where do bacteria live?

Look at the pictures below and click on the picture(s) if you think bacteria can survive there. 

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Ocean - Salty Water




Human Skin




 Bacteria are remarkably adaptable, they live almost everywhere.



A shovelful of soil contains billions of bacteria!





Quick Review


Organisms are classified into six kingdoms based on identifiable characteristics.


The six kingdoms are Archaebacteria, Eubacteria, Protista, Fungi, Plantae, and Animalia.


An organism has characteristics that are unique to the particular kingdom to which it belongs.




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Bacteria are used to make many different types of food, including sausages, pickles, some dairy products, and breads.





Lactic acid bacteria ferment the lactose in milk to preserve the flavor of food such as buttermilk, sour cream and yogurt.


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Other bacteria are used to make cheese. In Swiss cheese, bacteria grow in the cheese as it forms and releases gases. As the cheese hardens the pockets of gas remains giving the cheese its characteristic holes.

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When bacteria ferments cucumbers and cabbage you get pickles and sauerkraut. The lactic acid produced by the bacteria flavors and perserves these foods.














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Kingdom Eubacteria is located in Domain Bacteria

Bacteria are single-celled, prokaryotic organisms that occur alone or in chains or groups belonging to Kingdom Eubacteria. They are smaller than plant or animal cells. They are sometimes referred to as the "true bacteria."




Bacteria are the most diverse and abundant group of organisms on Earth. They live in almost all environments. They are found in the ocean, the soil, and the intestines of animals. They are even found in rocks deep below Earth's surface. Any surface that has not been sterilized is likely to be covered with bacteria. The total number of bacteria in the world is amazing. It's estimated to be five million trillion trillion. You have more bacteria in and on your body than you have body cells!


Structure of Bacterial Cells

Bacteria normally have three basic shapes:


Bacteria Shapes

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Coccus (pl. Cocci)


bacteria spherical.jpg


Bacillus (pl. Bacilli)

Rod Shaped



Spirilum (pl. Spirilla)

Spiral Shaped





Structure of Bacterial Cells

A typical bacterial cell is surrounded by a rigid cell wall that protects the cell and is covered by a sticky, protective coating called a capsule. They do not containa membrane-bound nucleus. The cell's genetic material, DNA is free-floating and located in the cytoplasm. Many bacteria have a smaller circular piece of DNA callled a plasmid. Bacteria can move around using flagella or cilia. Some bacteria have shorter and thicker outgrowth called pili.




 Characteristics of Bacteria


 All Bacteria:



 Hyperlink to DragNDrop Activity 



Reproduction in Bacteria

Under ideal conditions, bacteria can reproduce as often as once every 20 minutes. Fortunately, growing conditions are rarely ideal otherwise, their would soon be no room on earth left for any other organisms. Some bacteria reproduce asexually through a process called binary fission. While some bacteria reproduce sexually through a process called conjugation.








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Role of Bacteria

Most bacteria that cause disease are in the eubacteria kingdom. The eubacteria contain all of the bacteria that cause disease as well as the bacteria that are beneficial. it affects living thing things in many ways. and plays a key role in digestion, decomposition of organic materials and food. Bacteria have an important role to play in breaking down materials in the environment.



Not all bacteria are good. Some bacteria can cause food poisoning or infection. Some are harmful and break down material we'd rather keep, like this image of necrotizing fascitis (flesh eating bacteria).


"Good" Bacteria

These are just a few examples of the bacteria that play a beneficial—and often essential—role in the lives of living organisms.



"Bad" Bacteria

Not all bacteria are beneficial. Some can cause illness, disease, and even death. These are just a sample of bacteria that harm other living organisms.






Borrelia burgdorferi

Lyme disease

"bulls-eye" rash, headaches, fatigue, and chills

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food poisoning


abdominal cramping, diarrhea, vomiting, and fever




strep throat

swollen and painful throat, pus on tonsils, fever, and headache

streph throat.jpg


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Producer Eubacteria 

Eubacteria can also be grouped based on how they obtain their food. There are producers and consumers eubacteria. The Cyanobacteria is a producer that makes its own food. 

cyanobacteria.jpg The image to the left is cyanobacteria that contains chlorophyll and blue pigment. This combination of cyanobacteria is called blue-green bacteria. Some cyanobacteria are yellow, black or red.

Consumer Eubacteria

Consumer eubacteria are placed in two categories based on the results of the Gram's stain. Bacteria that stains purple are gram-positive and can be treated with antibiotics. In contrast, bacteria that stain pink are gram-negative and difficult to treat with antibiotics.

purple gram stain.jpg pinkgram.jpg

Gram-positive Gram-negative




Cyanobateria Image from Creative Commons




Driving Question:

What are the characteristics of organisms in Kingdom Bacteria?

germ_squishing_around_md_clr.gif You will complete the attached lab, pay close attention to the rubric on the last page. You will submit your answers to the Kingdom Eubacteria dropbox.




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