A Field Identified in a Table as Holding the Unique

question 20

Multiple Choice

A field identified in a table as holding the unique identifier of the table's records is called the:

• A)primary key.
• B)key field.
• C)primary field.
• D)foreign key.

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Definitions:

DNA

Deoxyribonucleic acid, a molecule that carries the genetic instructions used in growth, development, functioning, and reproduction of all known living organisms.

Information Transfer System

Mechanisms or structures that facilitate the exchange of data or knowledge between different entities or processes.

Fossil Record

The collection of fossils, which provides historical evidence of past life and evolution on Earth.

Ferns

Ferns are non-flowering vascular plants that reproduce via spores and have fronds, belonging to a group called Pteridophyta.