Final answer:
The positive result of an Anaerobic Jar is primarily the growth of obligate anaerobes, which cannot survive in the presence of oxygen, as well as aerotolerant and facultative anaerobes which can grow without it.
Step-by-step explanation:
The positive result of an Anaerobic Jar is the growth of anaerobic bacteria. This specialized equipment is designed to cultivate bacteria that thrive in the absence of oxygen. An anaerobic jar creates conditions that remove oxygen and release carbon dioxide (CO₂), simulating an anaerobic environment suitable for the growth of obligate anaerobes, which are killed by oxygen. Contrarily, aerotolerant anaerobes do not use oxygen for growth but are not harmed by it, and facultative anaerobes can grow with or without oxygen, switching between aerobic respiration and fermentation or anaerobic respiration based on oxygen availability. Therefore, the logical growth category related to oxygen is primarily obligate and aerotolerant anaerobes, with facultative anaerobes capable of growth as well.