Home Biology Organisms and Populations On the rocky sea coasts of Scotland, the lar…
Biology Organisms and Populations Single Correct MCQ
Published on: August 20, 2026

On the rocky sea coasts of Scotland, the larger and competitively superior barnacle Balanus dominates the intertidal areas and excludes the smaller barnacle Chathamalus from that zone. Which kind of interaction is being depicted by this example?

A
Predator
B
Parasitism
C
Commensalism
D
Competition

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The correct answer is:
D

Both barnacle species compete for the same space and resources on the rocky coast.

The larger Balanus outcompetes and excludes Chathamalus from the area.

This interaction is an example of interspecific competition.

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