Bacteria+-+PR

= = = = =toc Introduction =

Bacteria is harmful because it can get you really sick. Bacteria reproduce really fast into a lot of bacteria cells. However, the good bacteria fights the bad bacteria from getting you sick. Bacteria can also help you make food like cheese and help make the environment cleaner.

= = = = Bacteria cells have different structures. One is the flagellum. The flagellum helps a bacteria move around, Another structure is pili fimbriae. The pili fimbriae helps bacteria attach to different surfaces, including other cells. Bacteria cells also have a nucleoid. In a bacteria cell, it’s in the central region that holds the DNA. These structures make the bacteria do its job better. = =
 * What are structures of bacteria? **

= How do bacteria reproduce? =

The main job of bacteria is to reproduce and that's why there are billions of bacteria on the Earth. However, the conditions of bacteria have to be perfect. For example, they have to have plenty of food and the right temperature to survive. It's not always perfect and it's a good thing because then there will be a lot of bacteria cells than what there is now.

Bacteria can reproduce both “asexual” reproduction and “sexua”l reproduction. If bacteria reproduces asexaul “it is a reproduction process that involves only one parent and produces offspring that are identical to the parent.” __(Science Explorer pg 52).__ This process is called binary fission. So one parent cell produce can produce two offspring cells. Bacteria can also reproduce by sexaul reproduction. “Sexaul reproduction involves two parents who combine their genetic material” ( __Science Explorer pg 52__ ). This is where a bridge forms between two parental cells and they send each other genetic material. Then they break apart and leave two cells having different genetic material. This process is called “conjugation.” Then the two cells can go through binary fission and produce four offspring cells.

This video shows the reproducing of bacteria media type="youtube" key="gEwzDydciWc" width="420" height="315"

= How Can Bacteria Help People? = = = Bacteria can help people in many ways. One way is for good bacteria cells to fight the bad bacteria in our bodies so we won't get sick. If you have the flu, bacteria inside you is working hard to make you better. There is also bacteria in our stomach that helps us digest food so our cells can get the energy they need. And you probably didn't know that bacteria also is used to make different medicines like insulin for diabetics. Also, do you know that bacteria helps our environment too? When there is an oil spill, bacteria is used to change the poisonous chemicals into chemicals that don't harm us. = =

=Conclusion= Isn’t strange that bacteria is both good and bad. It's good because it helps us digest our food, but at the same time it's bad because bacteria can get in our bodies and get us really sick.

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