Why have populations of many ray- finned fish species decreased in recent years?
A) Overfishing by humans
B) Bacterial disease
C) Loss of their prey species
D) Parasitism by lampreys
E) Pollution of their environment
Correct Answer:
Verified
Q33: Chondrichthyes includes
A) all fishes.
B) lampreys.
C) sharks.
D) frogs.
E)
Q34: Lampreys differ from other vertebrates because they
Q35: Lamprey populations introduced into the Great Lakes
Q36: Fins composed of a web of skin
Q37: Which vertebrate group is the most diverse?
A)
Q39: Most have swim bladders.
A) jawless fishes
B) ray-
Q40: Fins composed of rod- shaped bones surrounded
Q41: Amphibians are not especially successful land- dwellers
Q42: Which of the following best describes the
Q43: A tadpole is a(n)
A) amphibian.
B) jawless fish.
C)
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