Silverswords Had No Tree and Shrub Competitors Prior to Recent

question 190

Multiple Choice

Silverswords had no tree and shrub competitors prior to recent human ecological disturbance to the Hawaiian Islands.Descended from a tarweed ancestor that evolved in an environment with many tree and shrub species, its arrival on the islands represented a(n) _______because of a(n) _______.

• A) evolutionary radiation; variety of open ecological niches
• B) lek; open ecological niche
• C) evolutionary radiation; competitive ecological niche
• D) lek; evolutionary radiation
• E) evolutionary radiation; prezygotic reproductive barrier

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