A species can be considered invasive if it
A) is deliberately introduced.
B) is accidentally introduced.
C) is still present 10 years after introduction.
D) becomes established after only one introduction.
E) increases in abundance and has negative effects.

Question

Quizplus · Accepted Answer

The most appropriate choice for identifying an invasive species is E, which characterizes a species as invasive if it increases in abundance and has negative effects. Options A through D may be factors in the introduction and/or establishment of invasive species, but they do not necessarily define an invasive species. For instance, some deliberately introduced species may not become invasive, while some accidentally introduced species may become invasive. Additionally, the timeframe for determining whether a species is invasive is not necessarily 10 years, as some species may exhibit invasive characteristics in a shorter time frame.

A Species Can Be Considered Invasive If It