A Local History Effect Occurs

question 10

Multiple Choice

A local history effect occurs

• A)because participants were not randomly assigned to groups.
• B)as a result of regression to the mean.
• C)when all of the participants are from the same location.
• D)when groups experience different events other than the quasi-independent variable.

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Definitions:

Secondary Succession

The process of ecological recovery in an area where a biological community was partially removed but where soil remains.

Primary Succession

Ecological succession that occurs in an environment in which new substrate devoid of vegetation and usually lacking soil, such as a lava flow or area left from retreated glacier, is deposited.

Forest Fire

Uncontrolled fire occurring in woodland or bush areas, which can have both destructive and beneficial effects on ecosystems.

Succession

The progressive, natural change in an ecosystem's species composition over time, leading to ecological stability.