A) One or more resources is limiting.
B) The population size of at least one species decreases.
C) The limiting resource does not change over time.
D) Two or more species interact.
E) none of the above

A) Semibalanus cannot survive in the lower intertidal.
B) removal of Semibalanus led to colonization by Chthamalus.
C) Chthamalus is able to live high and low in the intertidal.
D) he found that space is not limiting.
E) none of the above

A) assumes that interspecific and intraspecific competition are equivalent.
B) determines the outcome of the experiment.
C) assumes that interspecific competition is greater than intraspecific competition.
D) assumes that intraspecific competition is greater than interspecific competition.
E) none of the above