Clostridium, Bacteroides, and the methane-producing archaea (methanogens), are called obligate anaerobes because their energy-generating metabolic processes are not coupled with the consumption of oxygen.
Answer: The lipid bilayer forms a barrier to molecules because it consists of closely-packed molecules with long nonpolar hydrocarbon chains.
Explanation:
Oh man i remember learning about this but i cant remember what the answer is i will see what I can do :D
Plate tectonics located in our crust crashing or colliding into each other cause earthquakes to occur.
