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  1. c; keystone species are, by definition , important species in an ecosystem; therefor, they can not be a species ...

    3 Answers · Science & Mathematics · 25/08/2008

  2. ...that occurs in areas that lack soil and are barren of life 6) keystone species e. a species that plays a critical role in maintaining the...

    1 Answers · Science & Mathematics · 13/09/2011

  3. ...contribute to the class." Every time a question was asked on ' keystone species ' I remembered MY definition , and got everyone of them right when it came to the test. ...

    2 Answers · Education & Reference · 28/02/2012

  4. ...anything we do is, by definition , natural. Basically...preservation of endangered species , as if extinction isn't...pretty much the only constant in biology . Nature never ...it is a crucial ' keystone ' species . ...

    7 Answers · Arts & Humanities · 19/06/2010

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