The \"competitive exclusion principle\" states that A, dominant species can alwa

Question

The "competitive exclusion principle" states that A, dominant species can always outcompete recessive species. B. k-selected species will always outcompete r-selected species. C. no two species competing for the same resources can stably coexist D. only two species may occupy the same niche in a given community. E. predators will always competitively exclude their prey 83. In the interaction of two types of organisms in a habitat, one organism benefits from its interaction from the other but the other organism suffers. What is the name for this interaction? A. Destructive B. Parasitism C. Selective D. Commensalism E. Dependent 84. In reef-building corals, there is a symbiotic relationship between corals and a type of algae that live in their tissues. The corals gain energy and oxygen from this association and the algae obtain CO,, nitrogen and a stable habitat. This type of relationship is best categorized as: A. parasitism. B. mutualism. C. amensalism. E. 85. Keystone species: A. are more expendable than commensal species, from a conservation perspective. B. occur only in intertidal zones. C. play an unusually important role in determining the species composition in a habitat D. are primary producers and therefore usually are plants E. can be removed from a habitat without any impact on the remaining species in the habitat 86. disturbance is expected to have the greatest species richness A habitat with A. very little D. predictable B. an intermediate amount of E. a great deal of C. unpredictable

Explanation / Answer

82. C

83. B. parasitism

84. B. Mutualistic

85. C. Play an unusually important role in determining the species composition in a habitat.

86. B. an intermediate amount of

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