In an experiment, a microbiologist put equal numbers of each of the following organisms into a flask of sterile broth, consisting mostly of sugar and a few amino acids. She then placed the flask in the dark. Which of the organisms would be most likely to survive?

Identify the nutritional requirements of each organism type listed in the problem. Cyanobacteria and photoautotrophs require light for photosynthesis, while photoheterotrophs also rely on light but use organic compounds as a carbon source. Thermoacidophilic bacteria thrive in acidic and high-temperature environments, often using inorganic substances for energy.