Kingdom Eubacteria Eu new or true Parts of

Kingdom Eubacteria Eu = new or true

Parts of a bacterial cell Ø Cell wall (most have one thick cell wall OR a double cell wall) Ø Cell membrane Ø Cytoplasm Ø Nuclear material Ø Capsule Ø Flagella

Shape of bacterial cells a) Cocci - round bacterial cells. (cox-eye). A B b) Bacilli - rod- shaped bacterial cells. c) Spirilli (corkscrew) - spiral -shaped bacterial cells C

Names for bacteria shapes Prefix Ø Diplo- means two Ø Staphlo- cluster Ø Strepto- chain

Arrangement of bacteria PAIRS Ø occur as single cells or common groupings such as chains, uneven clusters, or pairs, tetrads, octads and other packets. Branhamella catarrhalis Streptococcus pyogenes

Nutrition in Eubacteria 1. Heterotrophic Ø use food produced by other organisms 2. Saprotrophic Ø feed on dead or decaying matter 3. Autotrophic Ø make their own food

*the oldest living organisms on Earth *there is evidence that bacteria without nuclei lived on earth 3. 5 billion years ago, Archaeo= ancient Bacteria = a unicellular micro-organism

Basics Ø consists of three main phyla Ø all are prokaryotes and unicellular Ø Not a lot of organisms in this kingdom Ø Prokaryotic =an organism with NO nuclear membrane

The 3 groups of Archaebacteria Methanogens 2) Extreme Halophiles 3) Thermoacidophiles 1)

1) Methanogens: *oxygen is a poison to these bacteria *thrive in extreme environments *They produce energy by converting H 2 and CO 2 into methane gas. geothermal springs (200 m below ground)

Methanogens have been discovered in two extreme environments on Earth Ø 1) Buried under kilometres of ice in Ø Greenland 2) living in hot, dry desert soil.

Mars Ø Some scientists have proposed that the presence of methane in the Martian atmosphere may be indicative of native methanogens on that planet Ø http: //www. space. com/science astronomy/051220_science_tu esday. html

2) Extreme Halophiles *these "salt-loving" bacteria live in environments with a very high salt concentration that would kill most other bacteria. *use salt to get energy *Found in the Dead Sea, Great Salt Lake, etc.

Colonies of “salty” bacteria built this!!! Shark bay, Australia. Ø rocky formations up to 1. 5 meters high which were built by colonies of halophiles. Ø

3) Thermoacidophiles *Live in extremely hot (110 C) and acidic (p. H 2) conditions. {The p. H of water is about 7} Ø Found in hot springs in Yellowstone National Park, in volcanic vents on land, & in cracks on the ocean floor that leak scalding acidic water Ø

Bacteria Of Boiling Hot Springs In Yellowstone National Park

A teaspoon of soil generally contains between 100 million and 1 billion bacteria Beneficial Bacteria The overwhelming majority of bacteria are completely harmless

5 types of friendly bacteria 1. 2. 3. 4. 5. Nature’s recyclers In our body Food production Oil spills Nitrogen fixing bacteria

1) Saprotrophic Bacteria Nature’s recyclers *release nutrients back into the environment *man-made landscapes often lack these good bacteria A scanning electron micrograph of the aerobic soil bacterium Pseudomonas fluorescens. The bacterium uses its long, whiplike flagellae to propel itself through the water layer that surrounds soil particles.

2) Our bodies: Ø Escherichia coli is a normal resident of the intestines in healthy people Ø it helps us break down food waste products Ø We pretty much depend upon E. coli in our intestines for our source of Vitamin K and Bcomplex vitamins.

3) Food production Ø Streptococcus lactis bacteria convert milk to cheese by causing the souring of milk that begins the cheese making process, Ø bacteria convert grapes to wine and then wine to vinegar Ø The name for this process is FERMENTATION

Fermentation A chemical process that occurs when bacteria change sugar into various products Ø It is a way that bacterial cells get energy without using oxygen Examples: Ø Grapes----- Wine----- Vinegar Ø Milk ----- Yogurt or cheese Ø Cabbage ----- Sauerkraut Ø

4) Oil spills Ø Naturally occurring, oil -eating bacteria are used in response to crude oil spills Ø without causing further harm to the environment.

How do oil spills cause harm? *Birds die from oil spills if their feathers are covered in oil. The bird will then be poisoned because it will try to clean itself. *Oil may also cause the death of an animal by entering the animal’s lungs or liver More than half of the seal pups living off the coast of Mid -Norway are contaminated with oil every spring

5) Nitrogen Fixing Bacteria some plants (peanuts, beans, peas) have pockets of bacteria in their roots Ø can take Nitrogen from the air and make it useful for plants and animals by making the soil fertile Ø helps farmers save $ on fertilizers Ø plants use Nitrogen to make needed proteins Ø