Which term describes an organism that does not require oxygen?

Which term describes an organism that does not require oxygen?

• A. Aerobic Organisms
• B. Pathogenic Organism
• C. Non-Pathogenic Organism
• D. Anaerobic Organism

Answer: (D)

Organisms that do not require oxygen to live are called anaerobic organisms. They thrive in environments without oxygen, and some are obligate anaerobes that cannot tolerate oxygen while others are facultative anaerobes and can use oxygen if it's present but do fine without it. This term directly describes how the organism relates to oxygen, which is why it fits the question. In contrast, aerobic refers to needing oxygen, while pathogenic and non-pathogenic describe whether an organism causes disease, not its oxygen requirement.

Organisms that do not require oxygen to live are called anaerobic organisms. They thrive in environments without oxygen, and some are obligate anaerobes that cannot tolerate oxygen while others are facultative anaerobes and can use oxygen if it's present but do fine without it. This term directly describes how the organism relates to oxygen, which is why it fits the question. In contrast, aerobic refers to needing oxygen, while pathogenic and non-pathogenic describe whether an organism causes disease, not its oxygen requirement.