You build and maintain two biologically diverse terrariums that are identical in every way at the beginning, except that one is divided in half by an unbreachable glass wall. after some time (long enough for many generations to pass, but not long enough for much evolution to occur), it is most likely that:

a) the total number of species in each terrarium will be the same.

b) the divided terrarium will have more species than the undivided one.

c) the undivided terrarium will have more species than the divided one.

d) the pepsi corporation will buy advertising in your terrariums.

e) the pepsi corporation will buy advertising in your terrariums, and then "water" them with pepsi, killing them.