The Following Questions Refer to the Hypothetical Patterns of Taxonomic

question 32

Multiple Choice

The following questions refer to the hypothetical patterns of taxonomic hierarchy shown in Figure 26.2.


-Which of the following numbers represents a polyphyletic taxon?

• A)2
• B)3
• C)4
• D)5
• E)more than one of these

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Definitions:

Diaphragm

A dome-shaped muscular partition separating the thorax from the abdomen in mammals, playing a major role in breathing by contracting and flattening to enlarge the thoracic cavity.

Orbicularis Oris

A complex of muscles in the lips that encircles the mouth, enabling it to close, pucker, and articulate words and expressions.

Diaphragm

A muscular and tendinous sheet that separates the chest cavity from the abdominal cavity and plays a major role in breathing.

Tendon

A tough, flexible band of fibrous tissue that connects muscles to bones.