Molecular oxygen ( o2 ), which is required for the production of atp by mitochondria, must pass through at least three membranes to get to the enzymes where it is used. o2 is also produced in chloroplasts and must pass through at least four membranes to be released from the plant. how does o2 move across biological membranes?

Alow-pressure belt means the air is cold and dry warm and rising cold and sinking warm and moist

How have ethnic groups shaped the population in central america and the caribbean? how has migration shaped the population in central america and the caribbean? how has small land areas shaped population in central america and the caribbean? how has a rapid population growth shaped the population in central america and the caribbean?

After railroads, the next revolution of transportation came with the development of (a) automobile (b) telegraph (c) steam engine