An Introduced Insect Is Devastating Several Related Plant Species Within

question 14

Multiple Choice

An introduced insect is devastating several related plant species within a diverse natural area.An environmental manager is tasked with developing and preserving the area.He decides to use a biological control method, a parasitic fly that feeds on the pest insect's larvae.Would this be considered a density-dependent or a density-independent approach to population control?

• A) Density-independent, because both pest and biological control agent are introduced
• B) Density-independent, because it is not likely to completely control the pest's density
• C) Density-independent, because the parasite could become a pest, causing a natural disaster
• D) Density-dependent, because it reduces the population density of the pest
• E) Density-dependent, because both pest and biological control agent are introduced

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Definitions:

Inheritance

Wealth or attributes passed on to heirs upon the death of an individual.

Lump Sum

A lump sum is a single payment of money, as opposed to a series of payments made over time.

Compounded Quarterly

The method of calculating interest where the accumulated interest is added to the principal amount after each quarter.