ANTIBIOTIC SUSCEPTIBILITY TESTING. Bacteria demonstrate two kinds of resistance to antibiotics, namely intrinsic resistance and acquired resistance. Intrinsic resistance means that the species was resistant to an antibiotic even before its introduction.
Radiation is naturally present in our environment, as it has been since before the birth of this planet. In addition, radiation can be produced artificially, as in medical x-rays and microwaves for cooking. Nonetheless, most people are not aware of all the natural and man-made sources of radiation in our environment.
Nuclear power plants do not normally give off radiation that can be detected, but then can have accidental leaks of radioactive materials which, in turn give off radiation. Th â¦ ese can get into the environment and be dispersed, eventually causing damage.ince there is no  benefit from radiation, no amount of increase in exposure to  radiation is good. Nevertheless, there are things we cannot do  without exposure to radiation, such as getting dental X-rays or  consuming the amount of potassium we need every day.