Placoderms were among the first fishes to display
A) jaws.
B) gill openings.
C) cartilaginous skeletons.
D) jaws and gill openings.
E) jaws, gill openings, and cartilaginous skeletons.
Correct Answer:
Verified
Q6: The vertebrate jaw first appeared in
A)fishes.
B)amphibians.
C)reptiles.
D)birds.
E)mammals.
Q7: Which of the following is a diagnostic
Q7: The feeding habits of lampreys are best
Q8: Two groups of invertebrate chordates are
A)filter feeders.
B)scavengers.
C)herbivores.
D)predators.
E)parasites.
Q9: Which of the following is (are) a
Q10: The notochord has a similar function to
Q13: The "tunic" of tunicate refers to
A)a body
Q14: Which of the following groups are tetrapods?
A)cartilaginous
Q15: Which of the following statements is NOT
Q16: During the life of a tunicate, the
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