In Experimental Condition 1 of Figure 54-1, the distribution of Balanus suggests:
a. that interspecific competition kept Balanus from extending higher into the intertidal area.
b. that intraspecific competition kept Balanus from extending higher into the intertidal area.
c. that an unfavorable environmental factor kept Balanus from extending higher into the
intertidal area.
d. that Balanus is less motile than Chthamalus.
e. that Balanus is more motile than Chthamalus
C
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