The range of the radar horizon dependson the height of the antenna and on the amount of bending of the radar wave.The bending is caused by diffraction and refraction. Diffraction is a propertyof the electromagnetic wave itself. Refraction is due to the prevailingatmospheric conditions.
Anaerobic bacteria, or anaerobes, are bacteria that do not need oxygen to live. In humans, these bacteria generally live in the gastrointestinal tract, but they may also be found in other places outside the body, including in the soil and water, in foods, and in animals.
1 Eubacteria can survive in a wide range of environments. 2  Some are aerobic, meaning they need oxygen to survive; while others are anaerobic, meaning they will die if oxygen is present. 3  Some make their own food, autotrophic, and some obtain their food from other organisms, heterotrophic. Some are aerobic, meaning they need oxygen to survive; while others are anaerobic, meaning they will die if oxygen is present. 2  Some make their own food, autotrophic, and some obtain their food from other organisms, heterotrophic. 3  There are more eubacteria than any other organism.