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Bacteria are very small prokaryote organinisms. Bacteria are made up of a single cell, so they are a kind of unicellualr organism. They have been living for billions of years. There are more individual bacteria than any other sort of organism on the planet. Most bacteria live on the ground, in water, in food, in or on our bodies, and in or on almost every surface or organism on the planet. There are about ten times as many bacterial cells as human cells in each of our bodies. Some bacteria can cause sickness and diseases, but others help us in everyday activities like digesting food. Some even work for us in factories, producing cheese and yoghurt.
A bacterium reproduces asexually and sometimes sexually by dividing in half and creating two "daughter" cells also called binary fission. Each daughter is identical in shape to the parent, but smaller. They vary widely in size and shape, but in general are at least ten times larger than viruses. A typical bacterium is about 1 ┬Ám in diameter, so a thousand bacteria lined up would be one millimeter long. There are about five nonillion bacteria on Earth. Most bacteria contain a cell wall for protection along with a cell membrane. Since bacteria cells do not have a nucleus, the genetic material simply floats around in the cytoplasm. Remember, the genetic material contains the instructions for all of the bacteria cell's functions. Some bacteria cells have flagella or tiny whip-like structures, which help the bacteria in movement.
Bacteria are identified and grouped by their shapes. The bacilli are rod-shaped, the cocci are ball-shaped and the spirilla are spiral-shaped. Pathogenic bacteria, the harmful kind, enter the human body from the air, water or food. Once inside, these bacteria attach themselves to or invade specific cells in our respiratory system, digestive tract or any open wound. There they begin to reproduce and spread while using the human body decaying organisms, or any source of their own nutrients and energy, and continue to multiply by the millions.




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QUESTION TIME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!


1) What was the first virus ever discovered?

2) True or False: Bacterial cells undergo genetic recombination.

3)Where do you find bacteria?!

4) Name a food source listed about of a food containing bacteria.














dont peek.....



answers:
1)Tobacco mosaic virus. The discovery of viruses began in 1883 with Adolf Mayer, a German scientist seeking the cause of tobacco mosaic disease

2)True

3)EVERYWHERE AND ANYWHERE

4)yogurt



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bacteria
binary fission
asxual
sexual
yogurt
everywhere
rod shaped
ball shaped
spirillia
















Sources:
http://peer.tamu.edu/curriculum_modules/Properties/module_1/lesson_bacteria2.htm

http://ezinearticles.com/?The-Definition-Of-Bacteria&id=1023024

http://www.lanesville.k12.in.us/lcsyellowpages/tickit/carl/bacteria.html