Bacteria+-+SF

=**Introduction:**= =Bacteria friend or enemy?=
 * Hi I am going to explain what is bacteria, whether or not bacteria is a friend or frenemy, the bacteria's energy system, the bacteria years and bacteria under a microscope. I hope you enjoy if you want to leave any comments or suggestions please do. THANK YOUUUUUUUUUUUUUU!!!!!!!!!!!!!!! And enjoy **

Actually there is an good bacteria Not at all. Actually most bacteria are very helpful to us. They play an important role in the planet's ecosystem as well as in human survival. Bacteria aren't all bad, in fact you couldn't survive without bacteria Good bacteria in your gut, probiotics they help digest your food and fight invading microbes. Good bacteria are used in making some of the dairy products you like to eat and also some types of medicines! Bacteria are some of the best decomposes what they do is they break down dead and decaying organic matter, from leaves to insects. Best of all, bacteria are being used to clean up oil spills to keep your environment healthy too. Good bacteria spend their days destroying their harmful cousins, picking through undigested leftovers and calories. But when stress, medications or a poor diet lay waste to these friendly flora, bad bacteria rush in to fill the void ( empty space ). And when bad bacteria prevail, illness strikes. A short-term imbalance can lead to diarrhea, bloating and gas. Over time, the disparity can contribute to more serious problems, including inflammatory diseases. That is when the good bacteria comes and fights the digestive system and the immune system so the person will get better soon. It turns out that bacteria can play a critical role in fighting obesity and diabetes and infections. =What is bacteria?=

Did you know that bacteria are the simplest of creatures that are considered alive. Bacteria are everywhere. They are in the bread you eat, the soil that plants grow in, and even inside of you. They are very simple cells that fall under the heading prokaryotic (which is a type of bacteria). That word means they do not have an organized nucleus. Bacteria are small single cells whose whole purpose in life is to replicate. Okay. So returning to what I told you they don't have an organized nucleus. True. They do have DNA. It is grouped in an area called the nucleoid. They have cell membranes like other cells and even a protective cell wall. Mind you, their cell wall is not like the one in a plant. It's a special kind that bacteria have for protection. They don't have any organelles, just (These are all characteristics of prokaryotes if you rememb er.)

= = =The energy system= Studies shown that the bacteria can be classified into 2 groups, based on the source of their energy. These 2 groups are the heterotrophs and the autographs. The heterotrophs( A organism obtaining its nutritional requirements from complex organic substances). G et their energy from breaking down organic compounds. They must first take these up from their bodies environment. Since these compounds were already made by other organisms, they contain the energy that the bacterium needs. The autotrophs  do not need to "eat" organic compounds; they can make them themselves. Autotrophic bacteria can fixate carbon dioxide to make their food source. This might be done in two ways, either by using light energy as the energy source, or by combining oxygen with nitrogen, sulfur or other elements. So instead of using the energy that is already present in organic compounds made by other organisms, they use chemicals or the sun as the energy source. CO 2 means carbon dioxide H 2 O means the chemical formula for dihydrogen monoxide which is water O 2 means oxygen H 2 means deuterium =Bacteria years=

Bacteria has been on earth SO long that it was there BEFORE oxygen! Yet bacteria cells have been on earth at least 3.5 billion years! Making them the oldest known life form on earth make that the oldest life and cell form!

[|__http://www.foxnews.com/science/2013/11/14/evidence-35-bilion-year-old-bacterial-ecosystems-may-be-earliest-sign-life-on/__]

Here is a image from evidence on fox news how here is proof that bacteria has been on Earth SO LONG before 3.5 BILLION YEARS! This rock above shows that it may be the earliest sign of life this rock has been found in North-West Australia. T here was plenty of life from the 3.4 and 3.5 billion-year-old mark – this is pushing it further back," researcher David Wacey, from the University of Western Australia told [|__The Telegraph__] .

=The bacteria under a microscope=

Bacteria comes in many shapes and sizes not all are the same size and shape. The most common bacteria forms are rods, spheres and spirals. Other bacteria cells are shaped like spiky ovals or bricks with rounded corners. However some are like skinny sticks while others look like bits of looped string. Yet some are more complex and shaped like little lunar landing pods. Bacterial cells tend to be about one tenth the size of a Eukaryota cell, which works out as around 0.5 to 5 micrometers in length! That is less than a millimeter!! I bet that is less than half a millimeter!!!!

here are some bacteria images

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