نسمه شموخ أغلى سلمى
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| موضوع: Good or Bad الإثنين أبريل 06, 2009 12:56 pm | |
| Good or Bad Both. Just about everywhere you go or look bacteria are present. You will find bacteria in people, animals, food, water, soil, and even in the air.
Bacteria are everywhere. Right now, while you are reading this, there are about a billion bacteria on every tooth in your mouth! So what are bacteria?
Bacteria are very tiny single-celled living things (organisms).
In fact, bacteria are so tiny that scientist must gather a lot of bacteria in groups (called colonies) and use high powered microscopes just to see them.
Bacteria live and reproduce from the nutrients in our bodies and in places like the food we eat.
Bacteria are responsible for making us sick. This usually happens after we eat rotten food caused by bacteria. Rotten food smells and tastes bad. Over time, bacteria grow on foods that are warm and have water (moisture). Eating food with a lot of bacteria sometimes causes food poisoning and makes us sick. Is it true that all kinds of bacteria are harmfulAbsolutely not! Actually, we can't live without bacteria. Some bacteria are good for our bodies. For example, there are bacteria in our intestines that help us digest our foodSome types of bacteria are used to make medicines. Other types can be used to make healthy food like yogurt and blue cheese. Now you know that bacteria are your friend and … your foe. | |
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a white rose وردة المنتدى
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| موضوع: رد: Good or Bad الإثنين أبريل 06, 2009 4:43 pm | |
| NICE TOPIC SALMA THANKS FOR YOUR HARD EFFORT | |
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يعجبني عنادي من دموعي أصنع الإبتسامات
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| موضوع: رد: Good or Bad الأحد أبريل 12, 2009 9:53 am | |
| Thank you Salma Very good | |
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ميدو مشاكل صديق ذهبي
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| موضوع: رد: Good or Bad الخميس أبريل 30, 2009 10:01 pm | |
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Dawn birth صديق لامع
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| موضوع: رد: Good or Bad الجمعة مايو 01, 2009 9:20 am | |
| thanks for this useful topic ............. Also some bacteria can synthesize some essential materials for human body such as vitamin k.
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Dr_aya Princess
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| موضوع: رد: Good or Bad الجمعة مايو 01, 2009 9:42 am | |
| very valuable topic thanks saloma :hhtt: | |
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