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:

Likely Products

Refers to the expected substances that result from a chemical reaction, based on the reactants and conditions.

Predominate Product

The main or most abundant product formed in a chemical reaction under the given set of conditions.

Major Product

The product that is formed in the greatest amount in a chemical reaction.

Geminal Dihalide

Organic compounds where two halogen atoms are attached to the same carbon atom.