Fins composed of rod-shaped bones surrounded by thick layers of muscle are characteristic of:
A) lobe-finned fishes.
B) ray-finned fishes.
C) hagfishes.
D) lampreys.
E) cartilaginous fishes.
Correct Answer:
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Q16: The great size and mobility of the
Q17: Which of the following features is absent
Q18: _ have a dorsal nerve cord.
A)Sharks
B)Bugs
C)Starfishes
D)Leeches
E)Earthworms
Q19: A tunicate is a(n):
A)bony fish.
B)cartilaginous fish.
C)jawless fish.
D)amphibian.
E)invertebrate
Q20: The earliest vertebrates lacked:
A)a notochord.
B)gills.
C)jaws.
D)brains.
E)skeletons.
Q22: Lungfishes are classified as:
A)amphibians.
B)lobe-finned fishes.
C)jawless fishes.
D)ray-finned fishes.
E)cartilaginous
Q23: Lamprey populations introduced into the Great Lakes
Q24: Which were the first tetrapods to move
Q25: Lampreys differ from other vertebrates because they
Q26: Most _ have swim bladders.
A)marine mammals
B)lobe-finned fishes
C)jawless
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