Invaders May Be Ecologically Compatible with the Area They Invade

question 10

Multiple Choice

Invaders may be ecologically compatible with the area they invade but may not expand in the target area because

• A) They cannot increase in population size sufficiently to produce a sustaining population
• B) They may be vulnerable to predators they have never encountered
• C) They may be vulnerable to parasites they have never before encountered
• D) All of the above

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Definitions:

Internal Validity

The extent to which a study can demonstrate a causal relationship between variables, minimizing the influence of external factors.

Independent Variable

A variable that is manipulated or changed in an experiment to observe its effects on a dependent variable.

Dependent Variable

In experimental research, the variable that is observed and measured to determine the effect of the independent variable, reflecting outcomes or changes.

External Validity

The extent to which the results of a study can be generalized to other situations and to other people.