The most primitive of the early fishes were the
A) Agnathans.
B) Gnathostomes.
C) Acanthodians.
D) Lobe-finned fishes.
E) Ray-finned fishes.
Correct Answer:
Verified
Q11: Unlike other vertebrates,the body fluids of hagfishes
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
Q17: Hagfishes
A)are entirely fresh water animals.
B)are parasitic.
C)have a
Q18: Cartilaginous fishes
A)lost the heavy dermal armor of
Q19: Shark characteristics include
_ having internal fertilization.
_ having
Q20: The cladistic use of the term "fish"
A)applies
Q21: In schooling,fish rely on sensitivity to vibration
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