Fossil Evidence Indicates That Several Kinds of Flightless Dinosaurs Possessed

question 10

Multiple Choice

Fossil evidence indicates that several kinds of flightless dinosaurs possessed feathers. If some of these feather-bearing dinosaurs incubated clutches of eggs in carefully constructed nests, this might be evidence supporting the claim that

• A) dinosaurs were as fully endothermal (warm-blooded) as modern birds and mammals.
• B) their feathers originally served as insulation, and only later became flight surfaces.
• C) the earliest reptiles could fly, and the feathers of flightless dinosaurs were vestigial flight surfaces.
• D) the feathers were plucked from the bodies of other adults to provide nest-building materials.
• E) all fossils with feathers are actually some kind of bird.

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Definitions:

GERD

Gastroesophageal Reflux Disease, a condition where stomach acid frequently flows back into the esophagus.

Hiatal Hernia

A condition where part of the stomach pushes up through the diaphragm muscle into the chest cavity.

Esophagitis

Inflammation of the esophagus, often causing heartburn, pain, and difficulty swallowing.

Appendectomy

Surgical removal of the appendix, typically performed to treat appendicitis.