A Field That Uniquely Identifies Each Record

question 24

Multiple Choice

A field that uniquely identifies each record.

• A) ID
• B) Primary key
• C) Common
• D) Numeric

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Definitions:

Substage Illuminator

A light source located beneath the stage of a microscope, used to illuminate the specimen from below.

Iris Diaphragm

An adjustable aperture used in optical instruments, like microscopes and cameras, to control the amount of light passing through the lens.

Condenser

A device used to condense vapor into liquid, widely used in laboratory equipment, air conditioning, and power plants.

High-Power Objective

A microscope lens with high magnification, used for observing fine details within specimen slides.