A selective medium contains. a substance that inhibits the growth of a certain type of microorganism while permitting the growth of a different type. If chemicals in a medium are manipulated so that the appearance of one microorganism is different from another, the medium is called.
The definition of resistant is someone or something that fends off or works against. An example of someone resistant is a older person who doesn't want to use email; resistant to change. An example of something resistant is a bug that isn't dying even though you've sprayed it with pesticide; resistant to spray. resistant. resistant.
Resistance is the opposition that a substance offers to the flow of electric current. It is represented by the uppercase letter R. The standard unit of resistance is the ohm, sometimes written out as a word, and sometimes symbolized by the uppercase Greek letter omega:n an AC circuit, the resistance and reactance combine vectorially to yield impedance. Resistance contrasts with conductance, which is a measure of the ease with which electrical current flows through a substance.