Chapter 12 Facilitation II Commensalism Quiz
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Questions and Answers

What type of interaction was observed between Juncus gerardi and Iva frutescens at low elevations with high soil salinity?

  • Commensalism (correct)
  • Mutualism
  • Parasitism
  • Competition

    • How did the interaction between Juncus gerardi and Iva frutescens change at high elevations with decreased soil salinity?

  • Iva frutescens was able to grow well on its own and even competed with Juncus gerardi. (correct)
  • Iva frutescens continued to depend on Juncus gerardi for growth.
  • Juncus gerardi started to depend on Iva frutescens for growth.
  • Iva frutescens and Juncus gerardi entered into a mutualistic relationship.

    • What did Callaway and colleagues observe in their experiments with alpine plants?

  • Plants competed at low elevations and formed mutualisms at high elevations. (correct)
  • Plants exhibited parasitism at low elevations and mutualism at high elevations.
  • Plants engaged in commensalism at both low and high elevations.
  • Plants formed mutualisms at low elevations and competed at high elevations.

    • What type of interaction was observed between Retama sphaerocarpa and Marrubium vulgare when growing alone?

    <p>There is not enough information to determine the interaction.</p> Signup and view all the answers

    What does the term 'facilitation' refer to in the context of plant interactions?

    <p>When one species benefits and the other is neither harmed nor benefited.</p> Signup and view all the answers

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