Kingdom: BACTERIA AND ARCHAEA

Kingdom: BACTERIA AND

ARCHAEA

These are Prokaryotes!!

Bacteria

Bacteria are literally everywhere. Skin, air, door handles, water fountains, ponds, desks, on food, in your intestines, ect

Your skin has on average 100,000 bacteria per square centimeter.

Bacteria a variety of environments from 0*C to 100*C and above. To us Americans that temperatures between 32*F and over 212*F

Binary Fission

Bacterial replication – Extremely simple It is a form of asexual reproduction The bacteria divides and to form an exact

copy of itself. Some rare cases – bacteria will exchange

genetic information through a tube. This is a form of sexual reproduction that gives some genetic diversity. (“grab-bag recomb”)

Bacteria Shape: Coccus

Simplest bacteria shape

Spherical or ball shaped

Typically grouped together

Staphylococcus Streptococcus

Bacteria Shape: Bacillus

Rod-shaped bacteria

Almost always Gram negative.

Typically have thin cell walls

E. coli is the most well known Bacilli bacteria

Bacteria Shape: Spirillium

Typically are spiral shaped, but can come in a variety of shapes.

Aerobic vs. Anaerobic Require oxygen to

breakdown food. Metabolism is similar to

most animals. Found in temperate

climates and habitats. Shallow waters as well.

Do not require oxygen to breakdown food.

Several forms of anaerobic bacteria can be found in your intestines.

Found also in deep water and deep soil.

Gram Negative vs. Gram Positive

Gram negative– Thin cell wall, very

little peptidoglycan– Gram negative

bacteria stain “Pink” when a Gram stain is done

Gram positive– Thick cell wall, high

in peptidoglycan– Gram positive

bacteria stain purple or very dark blue

Cyanobacteria

Producer eubacteria. They make their own food by “photosynthesis.”

Normally blue or green in color, but can be red, yellow, or black

Normally group together in chains.– They can do this because they are covered in jelly

like substance that lets them stick to each other.

Positive uses of Bacteria

Pasteurization of thinks like milk and juice Culturing foods such as cheeses. Cleaning up waste Bioremediation

Saprophytes and Nitrogen fixers

“Consumer bacteria”– Saprophytes use dead and decaying matter as

their food source. – They are responsible for nutrient recycling

Nitrogen fixing bacteria– These bacteria change nitrogen gas to a form that

plants and animals can use. – Found typically in the soil, around the roots of

plants

Bioremediation

What is Bioremediation?? Bioremediation is the completely safe and

natural process of cleaning up organic contaminants through the use of microbes.

 EZ Definition: Using bacteria to clean up waste

Harmful bacteria: Pathogens

Bacteria that can make you sick. Produce toxins, which are chemicals that are

poisonous to the body. Botulism, TB, Pneumonia are examples. Vaccines…..remember them. They help prevent many bacterial diseases.

Kingdom: ArchaebacteriaEXTREME-O-PHILE BACTERIA

– Thermophiles “ Heat lovers”– Methanophiles “Methane lovers”– “Sulfur lovers”– “Salt lovers”

Archaea features

No nucleus No membrane bound organelles Live in the most extreme conditions Were considered in Bacteria kingdom, until

the 1970’s Researched by Dr. Carl Woese and

colleagues at Univ. of Illinois