The Leading Explanation for the Disappearance of the Dinosaurs Ascribes

question 27

Multiple Choice

The leading explanation for the disappearance of the dinosaurs ascribes it to

• A) an Ice Age.
• B) an asteroid impact.
• C) solar ultraviolet radiation.
• D) hunting by early humans.

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Definitions:

Esophagogastroduodenal Endoscopy

A medical procedure that involves the insertion of a flexible tube with a light and camera to examine the lining of the esophagus, stomach, and upper duodenum.

Pulp Cavity

The central part of a tooth made up of living connective tissue and cells called odontoblasts.

Dentin

The hard but porous tissue located below the enamel and cementum of the teeth, which surrounds the core of dental pulp.

Crown

The visible part of a tooth above the gum line, or a type of dental restoration that fully covers or "caps" a damaged tooth.