In many sharks,extra buoyancy is provided by the:
A) Dorsal fin.
B) Swim bladder.
C) Liver.
D) Mouth.
E) Gills.
Correct Answer:
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Q2: The caudal fin of sharks is located
Q3: Demersal fishes:
A)Live on the surface of the
Q4: One of the following is not a
Q5: Which of the following structures do bony
Q6: The heart of all fishes has how
Q7: Rays and skates typically feed on:
A)Plankton.
B)Seaweeds.
C)Large fishes.
D)Organic
Q8: Chemical digestion in fishes usually begins in
Q9: Fishes with a small mouth located at
Q10: Because of the greater flexibility of their
Q11: The bright color of many fishes is
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