Patient discussion about evolution

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Q. How the bacterias are produced?

A1The Bacteria are a large group of unicellular microorganisms. Typically a few micrometres in length, bacteria have a wide range of shapes, ranging from spheres to rods and spirals. (The name comes from the Greek bakterion, meaning small staff.) Bacteria are ubiquitous in every habitat on Earth, growing in soil, acidic hot springs, radioactive waste,[2] water, and deep in the Earth's crust, as well as in organic matter and the live bodies of plants and animals. There are typically 40 million bacterial cells in a gram of soil and a million bacterial cells in a millilitre of fresh water; in all, there are approximately five nonillion (5×1030) bacteria on Earth,[3] forming much of the world's biomass.[4] Bacteria are vital in recycling nutrients, with many important steps in nutrient cycles depending on these organisms, such as the fixation of nitrogen from the atmosphere and putrefaction. http://en.wikipedia.org/wiki/Bacteria Hope this helps.
A2for every cell in your body there are 10 bacteria that sits on you. in a nice eco balance... but if that balance is being interrupted - let's say you kill a group. there is place for the neighbors to grow, so they multiply. by doing so there are sometime mutations in their genes. this mutation can help the bacteria of harm it. so naturally the bacterias with the beneficial mutation will survive. this is why today there are bacterias that are resistant to all of our antibiotics.
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