Gause’sexperiments with Paramecium and Didinium showed:a.extinction of the predator, followed by extinction of the prey, in allhabitats.b.coexistence of predator and prey at fairly constant population sizes, inall habitats.c.coexistence of predator and prey, but with oscillating population sizes,in all habitats.d.coexistence of predator and prey at fairly constant population sizes,but only in the presence of refuges and predator reservoirs.e.coexistence of predator and prey with oscillating population sizes, butonly in the presence of refuges and predator reservoirs.

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Communities and Ecosystems

Ecology contains two words: Eikos means dwelling, and logy means to study, so the combined meaning is studying habitat or living.