A Species of Bat Is Removed from a Community When

question 2

Multiple Choice

A species of bat is removed from a community when it is hunted to extinction.Within two years scientists notice seeds from several plants are no longer germinating.The bat was a

• A)community defining species.
• B)keystone species.
• C)primary consumer.
• D)producer.

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Definitions:

One-tailed

A hypothesis test where the area of interest is only on one side of the sampling distribution, indicating either a greater-than or less-than direction but not both.

Two-tailed

A type of statistical test that considers both directions of a possible effect, looking for deviations from a null hypothesis in two opposite directions.

Nondirectional

A hypothesis that does not predict the specific direction of the relationship between variables.

Null Hypothesis

A statement in research that posits there is no difference or relationship between certain variables, testing against an alternative hypothesis.