Final answer:
Anaerobes are organisms that do not require oxygen for growth and may even die in its presence. They can be strict anaerobes, facultative anaerobes, or aerotolerant anaerobes.
Step-by-step explanation:
Anaerobes are organisms that do not require oxygen for growth and may even die in its presence. There are different types of anaerobes:
- Strict anaerobes: These bacteria cannot survive in the presence of oxygen and use anaerobic respiration or fermentation to survive.
- Facultative anaerobes: These bacteria can switch between aerobic and anaerobic respiration, depending on the availability of oxygen.
- Aerotolerant anaerobes: These bacteria can tolerate the presence of oxygen but do not use it for respiration.