A(n) protects the internal organs of ray- finned fishes.
A) exoskeleton made of cartilage
B) internal cartilage skeleton
C) internal bony skeleton
D) exoskeleton made of chitin
E) notochord
Correct Answer:
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Q16: In all chordates, the notochord
A) may or
Q17: Which characteristic differentiates hagfishes from other craniates?
A)
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
Q22: Lungfishes are classified as
A) jawless fishes.
B) lobe-
Q23: Cartilaginous fishes differ from lampreys because they
A)
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
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