During the course of fish evolution,two of the gill arches evolved into ________.
A) gills
B) the pectoral fins
C) the swim bladder
D) the jaw
E) No answer choice is correct.
Correct Answer:
Verified
Q13: Which of the following reptilian features enabled
Q14: _ were the first vertebrates to live
Q15: The four defining characteristics of chordates are
A)segmentation,a
Q16: The vertebrates that lack jaws are called
A)rays.
B)turtles.
C)lampreys.
D)eels.
Q17: If the only chordate characteristic that adult
Q19: What is the main reason that mammals
Q20: Sharks
A)lack bony skeletons.
B)have dermal denticles.
C)have a keen
Q21: Mammals are different from birds in all
Q22: Generally the respiratory system in birds
A)is identical
Q23: Based on molecular data and skull features,what
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