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.
Aerobes are bacteria that require oxygen for survival. They cannot undergo metabolic processes without oxygen. Facultative anaerobes are well adapted and able to survive in a variety of environments whereas the obligate anaerobes and aerobic bacteria are limited in the types of environments that they can survive in.acteria that do not need oxygen to survive are called anaerobic bacteria. They may also live in places that have very little oxygen.