On Scottish coasts the larger barnacle Balanus excludes the smaller:
APisaster star
BOphrys orchid
CCactus moth
DChathamalus
Answer & Solution
Correct answer: D. Chathamalus
1. Connell studied barnacles on rocky shores.
2. The bigger species dominated the intertidal zone.
3. It excluded the smaller Chathamalus.
_Source: syllabus Biology, Chapter 13, Organisms and Populations._
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