Bacterium produces less total biomass. How might this be beneficial in the process of bioethanol production?

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

The picture shows a location in india that is very dry and arid. notice the tall mountains in the background; you can find high amounts of vegetation on the other side of the mountains. which statement is most likely true for this area?

All phases of matter may have a fixed mass