Question

Methanogens belong to

• A. eubacteria
• B. archaebacteria
• C. dinoflagellates
• D. slime moulds

Hint:

Remember the three domains of life: Archaea (often extremophiles like methanogens, halophiles, thermophiles), Bacteria (common bacteria), and Eukaryota (all organisms with membrane-bound organelles).

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
The question asks for the classification domain to which methanogens belong.

Step 3: Detailed Explanation:
Methanogens are microorganisms that produce methane as a metabolic byproduct in anoxic conditions. They are known for their unique metabolic pathways and the extremophile characteristics (living in extreme environments) often associated with Archaea.
* Archaebacteria (Archaea): Methanogens are a major group within the domain Archaea. Archaea represent a distinct domain of life, separate from Bacteria (Eubacteria) and Eukaryota.
* Eubacteria (Bacteria): These are "true bacteria" and do not include methanogens.
* Dinoflagellates: These are a type of single-celled eukaryotes, belonging to Protista.
* Slime moulds: These are also protists, characterized by their amoeboid movement and unique life cycles.
Therefore, methanogens are classified under Archaebacteria.

Step 4: Final Answer:
Methanogens belong to archaebacteria.