Some Birds Follow Moving Swarms of Army Ants in the Tropics.As

question 24

Multiple Choice

Some birds follow moving swarms of army ants in the tropics.As the ants march along the forest floor hunting insects and small vertebrates,birds follow and pick off any insects or small vertebrates that fly or jump out of the way of the ants.What is the specific benefit relationship?

• A)Birds benefit from the association but have no impact on the ants.
• B)Birds benefit from the association and harm the ants.
• C)Birds and ants benefit from the association.
• D)Birds do not benefit from the association,but the ants do.
• E)Neither birds nor ants benefit from the association.

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Definitions:

Testing

The process of evaluating a system or its component(s) with the intent to find whether it satisfies the specified requirements or not.

Null Hypothesis

A statistical hypothesis that suggests there is no significant difference between specified populations, any observed difference being due to sampling or experimental error.

Ratio

A quantitative relationship between two numbers showing the number of times one value contains or is contained within the other.

F-test Statistic

A value used in statistics to compare two variances and determine if they are significantly different, often used in the analysis of variance (ANOVA) tests.