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Bacteria are small organisms, or living things, that can be found in all natural environments. They are made of a single cell. Most bacteria can be seen only with a microscope. Bacteria do not have most of the structures found in the cells of other organisms.
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Bacteria vary widely in size and shape, but in general they are at least ten times larger than viruses. A typical bacterium is about 1 µm (one micrometer) in diameter, so a thousand bacteria lined up would be one millimeter long. There are about five nonillion (5×1030) bacteria on Earth. Bacteria are identified and grouped by their shapes. Bacilli ...
Pathogenicbacteria, 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 in any open wound. There they begin to reproduce and spread while using your body's food and nutrients to give them energy to help them reprod...
Some bacteria are extremophiles. These are bacteria that can live in very extreme conditions. For example some can live inside rocks up to 580 meters below the sea floor. According to one of the researchers, "You can find microbes everywhere — they're extremely adaptable to conditions, and survive wherever they are."
There are four major types of germs – bacteria, viruses, fungi and protozoa.The majority of the bacteria found in the body live in the gut, but can be found pretty much anywhere in or on the human body.Always flush the toiletwith the lid down as flushing the toilet with it up can cause a cloud of microscopic bacteria to become airborne from the toilet!Bacteria are all over household items like tv controllers, phones, cutting boards etc. Kitchen sponges can have up to forty-five billion microbes per square centimeter! It's a good idea to replace...Rod-shaped Bacillus subtilisPhylogenetic tree of Bacteria, Archaea and Eucarya. The vertical line at bottom represents the last universal common ancestor.An electron micrograph of Halothiobacillus neapolitanuscells with carboxysomes inside, with arrows highlighting visible carboxysomes. Scale bars indicate 100 nm.Learn what bacteria are, how they look, and where they are found. Discover the good and bad effects of bacteria on humans, plants, and the environment.
What is bacteria? Why do we need bacteria to stay healthy? How is bacteria the source of body odour? Pupils will learn about four kinds of bacteria in this science primary resource sheet – Actinomyces viscosus, Escherichia coli, Metanogens and Brevibacterium linens.
Bacteria are generally smaller than the cells of eukaryotes, but larger than viruses. Bacteria are measured in units of length called micrometers, or microns. One millimeter is equal to 1,000 microns; it takes about 25,000 microns to make up one inch (2.5 centimeters). Some bacteria measure only one half a micron.
