Unlike other vertebrates,the body fluids of hagfishes are
A) strongly hypoosmotic to seawater.
B) strongly hyperosmotic to seawater.
C) in osmotic equilibrium with seawater.
D) very concentrated,with over 80% blood solids.
E) under high internal pressure near the surface.
Correct Answer:
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Q6: The spiral valve in the intestine of
Q7: The chimaera
A)include representatives called ratfish and ghostfish.
B)have
Q8: Sharks have _ scales.
A)placoid
B)ctenoid
C)cycloid
D)ganoid
E)polyploid
Q9: The most diverse fish group is the
A)ray-finned
Q10: The large spiracles on the top of
Q12: The lateral-line of a shark is used
Q13: The cartilaginous fishes do NOT include
A)skates.
B)rays.
C)sharks.
D)eels.
E)All of
Q14: The hagfish has a keen sense of
A)depth
Q15: Shark reproduction and development involves
A)clearing a bottom
Q16: The most primitive of the early fishes
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