Lamprey populations introduced into the Great Lakes have grown dramatically. Why?
A) Competitive species have driven them from the ocean.
B) Fishermen have intentionally introduced them with the hope of farming them for "eel skin."
C) A fish species that they naturally prey upon has recently been introduced into the Great Lakes.
D) They have no natural predators in these waters.
E) Lamprey stocking programs have been highly effective.
Correct Answer:
Verified
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.
Q21: Fins composed of rod-shaped bones surrounded by
Q22: Lungfishes are classified as:
A)amphibians.
B)lobe-finned fishes.
C)jawless fishes.
D)ray-finned fishes.
E)cartilaginous
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
Q27: Why are lampreys classified as vertebrates?
A)They are
Q28: Parasitic lampreys have:
A)sucker-like mouths lined with teeth.
B)bony
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