Gause's Experiments with Paramecium and Didinium Showed

question 18

Multiple Choice

Gause's experiments with Paramecium and Didinium showed

• A) extinction of the predator, followed by extinction of the prey, in all habitats.
• B) coexistence of predator and prey at fairly constant population sizes, in all 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, but only in the presence of refuges and predator reservoirs.

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Definitions:

Declare War

The formal act by which a nation-state announces and justifies its intent to engage in armed conflict against another state or organization, often requiring approval by its government or legislature.

Commander-in-Chief

The title given to a person who exercises supreme command and control over an armed forces branch or the entire military of a nation.

Veto Legislation

The power of an executive authority to refuse approval of a bill or proposal, preventing its enactment into law.

Discretion

The freedom to decide what should be done in a particular situation, often given to officials or agencies in executing laws and policies.