_______ are strains that are unable to grow on a minimal medium that supports growth of the wild type strain,but are able to grow on the minimal medium if one or more nutritional supplements are added.

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Auxotrophs are strains that have a nutritional requirement for growth that is not present in the minimal medium that supports growth of the wild type strain. They are unable to synthesize the required nutrient due to a mutation. Therefore, they require the nutrient to be added to the medium in order to grow. Autotrophs, on the other hand, are able to synthesize all required nutrients from simple inorganic substances. Prototrophs are wild type strains that are able to grow on a minimal medium without the addition of any supplements. Minitrophs are not a recognized terminology in microbiology or genetics.

_______ Are Strains That Are Unable to Grow on a Minimal