As the following figure illustrates,the distribution of numerous intertidal organisms is restricted to bands or zones.The upper limit to the zone is determined by tolerance to physical factors such as desiccation,whereas the lower boundary is determined by a biological interaction such as competition. What could account for the lower limit for Semibalanus?
A) competition from adult Chthamalus living in deeper water
B) the force of the waves on the lower portions of the rock
C) predation from less tolerant predators such as sea stars
D) overheating during low tide exposure

Question

As the following figure illustrates,the distribution of numerous intertidal organisms is restricted to bands or zones.The upper limit to the zone is determined by tolerance to physical factors such as desiccation,whereas the lower boundary is determined by a biological interaction such as competition.  What could account for the lower limit for Semibalanus?
A) competition from adult Chthamalus living in deeper water 
B) the force of the waves on the lower portions of the rock 
C) predation from less tolerant predators such as sea stars 
D) overheating during low tide exposure

Quizplus · Accepted Answer

The lower limit for Semibalanus is determined by biological interaction, specifically predation from less tolerant predators such as sea stars.

As the Following Figure Illustrates,the Distribution of Numerous Intertidal Organisms