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15 - Biology:,6e(Campbell Chapter15 1 Tracing Evolutionar...

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Biology: Concepts and Connections, 6e (Campbell)  Chapter 15    1
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Tracing  Evolutionar y History Multiple - Choice Questions 1) 
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Which of  the following statements correctly describes the relationship between pterosaurs and birds?  A) 
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Birds descend  from pterosaurs and inherited their flight ability from them.  B) 
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Birds descend  from feathered dinosaurs. Pterosaurs are a distinct group that went extinct about the time that birds arose.  C) 
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Birds, bats, and  pterosaurs are all descendants of a common winged ancestor.  D) 
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Birds have  membranous wings, which distinguishes them from pterosaurs, which were feathered.  E) 
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The  evolutionary  relationship between birds and pterosaurs remains uncertain because no fossils exist that help to determine the  relationship.  Answer:  
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Topic: 
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Opening Essay  Skill: 
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Conceptual  Understanding
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2) 
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The "big  bang" that produced the universe is thought to have occurred  A) 
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50 trillion years  ago.  B) 
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40 billion years  ago.  C) 
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10 to 20 billion  years ago.  D) 
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4.6 billion years  ago.  E) 
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4 million years  ago.  Answer:  
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Topic: 
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15.1  Skill: 
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