Download D. Growth and Reproduction

Bacteriology
Study of ___________
BACTERIA!!! OMG they are everywhere
What do you know about bacteria?
Fun Facts about Bacteria
1. Bacteria help our bodies with digestion and produce needed vitamins.
2. Bacteria help us by destroying harmful organisms within our bodies.
3. There are more bacterial cells in your body than there are human cells.
4. Bacteria are used to make cheese, milk, sourdough bread & yogurt.
5. 99% of all bacteria are helpful.
6. Dead or weakened bacteria & viruses are used for making helpful vaccines.
7. Scientists estimate that bacteria produce nearly half the oxygen found in the
atmosphere.
8. Helpful bacteria are used to purify water at sewage treatment plants and to
break down oil after oil spills.
9. One healthy bacterium could reproduce into a colony of more than 2 million in
just seven hours.
10. There are more microbes on your body than there are humans on the entire
planet.
11. An area of skin as small as 6.5 square cm (1 square inch) may be home to
more than 500,000 microbes.
Bacteria Evolution
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• Bacteria fossils have been found in
rocks from the Devonian Period
(416 to 359.2 mya)
• Fossil evidence suggests that
bacteria have been on Earth at
least 3.5 billion years
• During the Proterozoic Eon (~1.5
bya) oxygen appeared in the
atmosphere as a results of the
action of the cyanobacteria
Where do Bacteria live?
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Soil
Acidic Hot Springs
Radioactive Waste
Water
Deep in the Earth's Crust
Outer Space
Plants & Animals
Classification of Bacteria
Domains
• Archae
o Kingdom: Archaebacteria
• Bacteria
o Kingdom: Eubacteria
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How to study and identify
A. Morphology:
1.The branch of biology dealing with the form and structure of
organisms.
2.The form and structure of an organism considered as a
whole.
B. Cell Structures:
1. Intracellular: Inside the cell
2. Extracellular: outside the cell
C. Metabolism:
Gathering and using energy
D. Growth and Reproduction:
Multiply
Hypothesis:
Sketch of Bacteria/ Human Cells
Bacteria
Human
Size of Bacteria
Power of ten
A. Morphology
B. Cell Structures
Which organelles are you familiar with?
Extracellular
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What are the functions of the
following?
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Capsule:
Cell Wall:
Pili:
Flagella:
Cytoplasmic Membrane:
Intracellular
7
What are the functions of the
following?
• Nucleoid:
• Ribosomes:
• Cytoplasm:
Different Types of Bacteria Cell Walls
3
Extracellular Structures
Bacteria Metabolism
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What nutrients do bacteria want?
• C
• N
• O
(Sugar, Lipid) => Energy, Biosynthesis
(Protein)
=> Biosynthesis
(Air)
=>
Energy
Bacteria Process these nutrient through:
• Aerobic Respiration
• Anaerobic Respiration
• Anaerobic Fermentation
C. E. coli
Metabolism
Where does this take place?
Bacteria Reproduction:
Many ways to make more
D. Growth and Reproduction
Reproduction
Binary fission
Describe what you
see.....
Colony Morphology
Making
bacteria
work
Links
1. Virtual Museum of Bacteria:
http://www.bacteriamuseum.org/niches/features/morphology.shtml
2. Image of Bacteriology
http://hospital.blood.co.uk/diagnostic_services/transfusion_microbiology_services/
final_images/BacWork.jpg
3. Image of Gram Positive/ Gram Negative
http://gsbs.utmb.edu/microbook/images/fig2_6.jpg
4. Where to find bacteria http://en.wikipedia.org/wiki/Bacteria
5. Bacteria
Evolution http://www.britannica.com/EBchecked/topic/48203/bacteria/272371/Evo
lution-of-bacteria
6. Bacteria Classification
http://www.biologycorner.com/bio1/notes_domains_kingdoms.gif
7. Intracellular Components http://micro.magnet.fsu.edu/cells/bacteriacell.html
8. Bacteria Metabolism http://www.northern.wvnet.edu/~tdanford/slide2.htm
How to use a Microscope
1.Start on Low Power
2.Use large focus to find the image on the slide
3.Use fine focus to make the image clearer
4.Move to Medium Power
5.Use fine focus to make the image clearer
6.Move to High Power
7.Use fine focus to make the image clearer
Human Cheek Cell
1. Use a toothpick to scrape the inside of your check to
collect cheek cells.
2. Place the cells onto a microscope slide
3. Place dye on to your cheek cells
4. Cover the sample with a cover slip
5. Look at your cells under the microscope on low
power & sketch
6. Look at your cells under the microscope on medium
power & sketch
7. Look at your cells under the microscope on high power
& sketch
Bacteria Cells