Cartilaginous fishes differ from lampreys because they
A) lack a skull.
B) are ectotherms.
C) lack a skeleton.
D) have a three- chambered heart.
E) have jaws.
Correct Answer:
Verified
Q18: At some stage of the life cycle,
Q19: A tunicate is a(n)
A) invertebrate chordate.
B) jawless
Q20: All chordates have
A) a ventral, hollow nerve
Q21: A(n) protects the internal organs of ray-
Q22: Lungfishes are classified as
A) jawless fishes.
B) lobe-
Q24: Which were the first tetrapods to move
Q25: Lampreys have reduced the size of commercial
Q26: Parasitic lampreys have
A) sucker- like mouths lined
Q27: A shark is a(n)
A) jawless fish.
B) invertebrate
Q28: A lamprey is a(n)
A) amphibian.
B) jawless fish.
C)
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