During an experiment, a researcher observes that a particular bacterial strain grows on a medium supplemented with arginine but fails to grow on a minimal medium. What is the most likely classification of this bacterial strain regarding its arginine synthesis capability?

A bacterial culture is unable to synthesize the amino acid arginine due to a genetic mutation, making it an arginine auxotroph. To study its growth patterns, which of the following should be added to its growth medium?

In a study of microbial growth, a researcher is examining a strain of bacteria that requires an external source of niacin to proliferate. Which term best describes this strain?