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.
They have no membrane-bound organelles and can adapt to their environment very quickly. They are found on all continents of the Earth, including Antarctica, and they can be found in some of the most extreme conditions on Earth, such as in hot water springs and near hydrothermal vents deep below the oceans.. Listeria monocytogenes-Listeria monocytogenes is a Gram-positive rod-shaped bacterium. It is anaerobic. The most common infection that these bacteria cause is Listeriosis. Symptoms of this infection are headaches, nausea and vomiting; however, if the infection spreads to the nervous system, it can cause meningitis.