Primary Key ______________ in Tables Must Be Unique Identifiers

question 139

Short Answer

Primary key ______________ in tables must be unique identifiers.

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Definitions:

Concentration Gradient

The process by which the concentration of molecules moves from an area of higher concentration to an area of lower concentration, a fundamental principle in diffusion.

Dissolved Oxygen

The amount of oxygen present in water, crucial for the respiration of aquatic life and a key indicator of water quality.

Diaphragm

The diaphragm is a major muscle involved in respiration, separating the thoracic cavity from the abdominal cavity and contracting to allow inhalation.

Forced Expiration

The act of expelling air out of the lungs with effort beyond normal exhalation, often used in respiratory tests.