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

---

Definitions:

Sales Clerk

An employee who assists customers and handles transactions in a retail environment.

Express Mail Service

An international postal Express Mail Service for documents and merchandise, provided by postal operators of the Universal Postal Union.

Flight Attendant

A professional responsible for ensuring the safety, comfort, and service for passengers aboard an aircraft.

Information Technology

The utilization of computers, storage systems, networking components, and various physical infrastructures to generate, manipulate, conserve, protect, and share any type of electronic data.