True or False: Fastidious bacteria require organic growth factors.

Fastidious bacteria are those that have complex growth requirements and cannot grow on minimal media. They require specific organic growth factors because they are unable to synthesize certain nutrients on their own. These essential factors may include vitamins, amino acids, or other organic compounds that are crucial for their survival and reproduction. Since the definition of fastidious bacteria inherently involves their dependency on these organic substrates, the statement that they require organic growth factors is indeed true.

The other options reflect various degrees of misunderstanding about fastidious bacteria. While some bacteria may have variable growth requirements based on environmental conditions or might exhibit some level of adaptability, the characteristic nature of fastidious bacteria explicitly designates their reliance on organic growth factors as a defining trait.