Why Can Studies of Carbon Isotopes Be Used to Detect

question 46

Multiple Choice

Why can studies of carbon isotopes be used to detect the presence of past biological activity in rocks?

• A) living organisms absorb only the most common carbon isotope
• B) living organisms remove all carbon from rocks
• C) living organisms absorb certain carbon isotopes more easily than others
• D) carbon isotopes are found only in living organisms

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Definitions:

Obsessive-Compulsive Disorder

A mental disorder characterized by persistent, unwanted thoughts (obsessions) and repetitive behaviors (compulsions).

Claustrophobia

An anxiety disorder characterized by an intense fear of being enclosed in a small space or unable to escape, leading to panic.

Psychogenic Fugue

Psychogenic Fugue, also known as dissociative fugue, is a psychological state in which a person temporarily loses their sense of personal identity and impulsively wanders or travels, often forgetting their past.

Disorganised Schizophrenia

A subtype of schizophrenia characterized by disorganized speech and behavior, as well as inappropriate or blunted emotional responses.