Question 53 / 120:  Some of the first animal species to colonize Mt. St. Helen's after its eruption were spiders. They "ballooned" in on silk threads. These first species are examples of
A  Secondary species
B  Pioneer species
C  Climax species
D  Primary species
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Evolutionary Biology & Ecology BIO102

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Attribution:  Olivia D'Ambrogio Introduction to Evolutionary Biology and Ecology. (The Saylor Academy 2014), http://www.saylor.org/courses/bio102/ (Accessed 16 May, 2014). License: Creative Commons BY-NC-ND
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