The four defining characteristics of chordates are
A) segmentation,a dorsal hollow nerve cord,pharyngeal pouches,and an amniotic egg.
B) a dorsal hollow nerve cord,a notochord,bilateral symmetry,and mammary glands.
C) bilateral symmetry,segmentation,a well-developed coelom,and limbs.
D) a well-developed coelom,pharyngeal pouches,a notochord,and jaws.
E) pharyngeal pouches,a dorsal nerve cord,a notochord,and a postanal tail.
Correct Answer:
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Q10: Which of these characteristics is NOT found
Q11: In some chordates,the _ is (are)replaced by
Q12: The jawed fish and all other vertebrates
Q13: Which of the following reptilian features enabled
Q14: _ were the first vertebrates to live
Q16: The vertebrates that lack jaws are called
A)rays.
B)turtles.
C)lampreys.
D)eels.
Q17: If the only chordate characteristic that adult
Q18: During the course of fish evolution,two of
Q19: What is the main reason that mammals
Q20: Sharks
A)lack bony skeletons.
B)have dermal denticles.
C)have a keen
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