The answer is relative dating.
They produce hydrogen gas when reacted with metals
I think the correct answer from the choices listed above is option B. You can find methanogens in the human intestines. These organisms can work with or without oxygen. Too much of oxygen for them is toxic. They are obligate anaerobes.
Answer:
A) They reproduce asexually through a form of cell division called binary fission.
Explanation:
It's similar to mitosis in eukaryotic cells
