One of the Criteria for Determining Whether Variable X Causes

question 26

Multiple Choice

One of the criteria for determining whether variable X causes variable Y is that

• A) Variable X must occur prior to Variable Y
• B) Variable Y must occur prior to Variable X
• C) Variables X and Y must occur simultaneously
• D) The order of X and Y is not relevant

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Definitions:

Porphyra

A genus of red algae that grows in cold seawater and is commonly used as nori in sushi preparation.

Aquatic Food Chains

The hierarchical sequence of organisms each dependent on the next as a source of food in an aquatic environment.

Diatoms

Diatoms are a major group of algae, characterized by their unique cell walls composed of biogenic silica.