Bacteria term paper

Antibiotics are natural substances secreted by bacteria and fungi to kill other bacteria that are competing for limited nutrients. (The antibiotics used to treat people today are typically derivatives of these natural products.) Scientists are dismayed to discover that some bacteria have become resistant to antibiotics through various alterations, or mutations, in their DNA.

The Dutch merchant and amateur scientist Anton van Leeuwenhoek (1632–1723) was the first person to observe bacteria and other microorganisms. Using single-lens microscopes of his own design, he described bacteria and other microorganisms (calling them "animalcules") in a series of letters to the Royal Society of London between 1674 and 1723.

Michael Pollan is the Knight professor of journalism at the University of California, Berkeley, and the author, most recently, of “Cooked: A Natural History of Transformation.”


REGENERATION OF ANIMALS
Some animal can be cut in half and from each part will grow a complete individual. Try to cut in half a planaria, a hydra, a tubifex. Keep these "pieces" in their natural environment and you will see they will regenerate the other part.

“Fecal bacteria and other pathogens may have hitched a ride from someone’s hands, nose or apron onto our cash. And yeast or mold might have taken hold, too,” a new Scientific American report explains. “Lower-denomination bills are used more often, so studies suggest our ones, fives and tens are more likely to be teeming with disease-causing bacteria.”

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Michael Pollan is the Knight professor of journalism at the University of California, Berkeley, and the author, most recently, of “Cooked: A Natural History of Transformation.”