Eutrophication

question 60

Multiple Choice

Eutrophication

• A)encourages heavy surface algal blooms.
• B)can block the O₂ supply to the lake.
• C)occurs when there are excess nutrients in aquatic ecosystems.
• D)causes massive die-off of fish and invertebrates.
• E)All of the choices are correct.

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Definitions:

Main Effect

In analysis of variance, the direct influence of an independent variable on a dependent variable, discounting interactions with other variables.

Factor A

A variable manipulated or monitored to determine its effects on an outcome in an experiment.

Critical Value

A threshold value that separates the region where the null hypothesis is rejected from the region where it is not rejected, based on the chosen significance level.

Df

Short for Degrees of Freedom, it represents the number of independent pieces of information available to estimate another piece of information.