The Geologic Time Scale Is Often Subdivided on the Basis

question 29

Multiple Choice

The geologic time scale is often subdivided on the basis of ____.  

• A) the appearance of different radioactive isotopes in different strata
• B) levels of background extinction
• C) periods of extensive environmental change
• D) the appearance of new species
• E) climate change

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Definitions:

Obsessive-compulsive-related Disorders

A group of psychiatric disorders characterized by obsessive thoughts and compulsive actions, often causing significant distress and impairing daily functioning.

Clinically Significant Fear

An intense and persistent fear that is excessive or unreasonable and leads to significant distress or impairment in functioning.

Everyday Fear

Common fears that individuals experience during routine daily activities.

Unconditional Positive Regard

Full, warm acceptance of a person regardless of what he or she says, thinks, or feels; a critical component of client-centered therapy.