The ¹³C/¹²C Isotopic Ratio of Geological Rocks of Different Ages

question 28

Multiple Choice

The ¹³C/¹²C isotopic ratio of geological rocks of different ages has been used as evidence for or against past biological activity,because compounds of biological origin

• A) do NOT contain ¹³C.
• B) have a higher proportion of ¹³C that compounds of geological origin.
• C) have a lower proportion of ¹³C that compounds of geological origin.
• D) are not well preserved in geological samples.

---

Definitions:

Comparative Advantage

The ability of an individual or entity to produce goods or services at a lower opportunity cost than other individuals or entities.

Economic Investment

The expenditure on capital goods used to produce other goods or services in the future, contributing to a country's productive capacity.

Fermentation System

A biological process using microorganisms to convert organic materials into alcohol, gases, or acidic products.

Entrepreneur

An individual who creates a new business, bearing most of the risks and enjoying most of the rewards, often seen as an innovator and a source of new ideas, goods, services, and business/or procedures.