How does archeabacteria acquire energy?

Question

I have tried googling it but i cant find it anywhere, please help me?

Answer 1

http://users.rcn.com/jkimball.ma.ultrane...

Go to that link. This is a very broad group of organisms. A couple of examples follow:

Methanogens are chemoautotrophs; using hydrogen as a source of electrons for reducing carbon dioxide to food and giving off methane ("marsh gas", CH4) as a byproduct.

4H2 + CO2 -> CH4 + 2H2O

Some use use hydrogen as a source of electrons to reduce sulfur in order to get the energy they need to synthesize their food (from CO2).