In this experiment, Balanus was removed from the habitat shown on the left. Which of the following statements is a valid conclusion of this experiment?
a) Balanus can survive only in the lower intertidal zone because it is unable to resist desiccation.
b) Balanus is inferior to Chthamalus in competing for space on rocks lower in the intertidal zone.
c) The two species of barnacles do not compete with each other because they feed at different times of day.
d) The removal of Balanus shows that the realized niche of Chthamalus is smaller than its fundamental niche.
Answer: d) The removal of Balanus shows that the realized niche of Chthamalus is smaller than its fundamental niche.
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