TLS Online TPP Program

#Question id: 12240


Two plant species co-occur in a prairie. Species X always occurs near species Y. However, species    often occurs in isolation from species X and produces more seeds when alone than when growing next to species X. Which of the following interactions between species X and Y could generate this pattern?

#Unit 10. Ecological Principles
  1. Competition, in which Y is superior to X in accumulating resources
  2. Mutualism, in which both X and Y benefit by exchanging resources
  3. Parasitism, in which X benefits from resources produced by Y and reduces the growth of Y by doing so
  4. Commensalism, in which X benefits from resources produced by Y but does not affect the growth of Y by doing so