Often, when exotic species like purple loosestrife and zebra mussels are introduced into a new environment, their numbers initially increase exponentially but eventually level off. The leveling off of their numbers could be due to __________.

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    the predators, competitors, and parasites that controlled their numbers in their native range finally catching up with them as they too arrive in the new home
    the population reaching its carrying capacity
    the predators, competitors, and parasites already present in their new home finally "learning" (or evolving) how to combat them and control their numbers
    all of the above

asked May 30, 2013 in Biology by anonymous
    

1 Answer

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all of the above
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)

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