Which of the following statements best represents evidence that supports the leading hypothesis regarding the evolution of jaws in vertebrates?

+2 votes

 

Fossil evidence indicates that the diversity of ray-finned fishes began to expand considerably when fish possessed only gill arches.

The tissue composing jaws is very different in origin from that composing gill arches, though it performs a similar function.

Both jaws and gill supports are derived from the same type of specialized embryonic cells.

The first fossil evidence of animals with primitive jaws showed that they were deposit feeders.

 

asked Dec 29, 2012 in Biology by anonymous
edited Dec 29, 2012
    

1 Answer

+1 vote

 

Both jaws and gill supports are derived from the same type of specialized embryonic cells.

 

answered Dec 29, 2012 by JPx ~Expert~ (379 points)

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