Question 1 Which one of the followings need less amount of oxygen to survive? a. Microaero filic microorgansims b. Aerotoleran c. Aerobic organisms d. Anaerobic microorganisms

The correct answer is d. Anaerobic microorganisms.<br /><br />Anaerobic microorganisms are able to survive and grow in the absence of oxygen. They do not require oxygen for their survival and can thrive in environments with little or no oxygen. In contrast, aerobic organisms require oxygen for their survival, and aerotolerant organisms can survive in the presence of oxygen but do not use it for growth. Microaerophilic microorganisms require a lower concentration of oxygen for their growth compared to aerobic organisms. Therefore, anaerobic microorganisms need the least amount of oxygen to survive among the given options.