Lampreys differ from other vertebrates because they lack
A) skulls.
B) jaws.
C) metabolism.
D) gills.
E) hearts.
Correct Answer:
Verified
Q31: Which vertebrate group is the most diverse?
A)
Q32: A(n)_ protects the internal organs of ray-finned
Q33: Why are lampreys classified as vertebrates?
A) They
Q34: Most _have swim bladders.
A) jawless fishes
B) ray-finned
Q35: Fins composed of rod-shaped bones surrounded by
Q37: Why have populations of many ray -finned
Q38: A shark is a(n)
A) invertebrate chordate.
B) jawless
Q39: Lungfishes are classified as
A) cartilaginous fishes.
B) ray-finned
Q40: The skeletons of rays and skates are
Q41: Which vertebrate group has a three-chambered heart?
A)
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