What would the oxygen measurements be on either side of the apparatus if there were no fish in it and the two chambers were fully sealed off from one another?

a. the same as with the fish present

b. via osmosis, the oxygen on both sides would equilibrate and be equal.

c. the oxygen levels would be maintained at whatever they started at.

d. oxygen uptake would maintain at 80 percent.

i am going to guess that it is co2.

lysosome is this part of the cell is surrounded by a very thick outer membrane to protect the rest of the cell from its strong enzymes.

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.