The large spiracles on the top of the head of skates and rays is for
A) air intake for respiration.
B) water intake to prevent clogging the gills.
C) detection of bioelectric fields from prey buried in the sea bottom.
D) detection of chemical odors in the water.
Correct Answer:
Verified
Q1: Shark characteristics include
having internal fertilization.
having isosmotic blood
Q2: The ovoviviparous sharks are those that
A)lay eggs
Q4: In North America,knowledge of the biology of
Q6: Unlike other vertebrates,the body fluids of hagfishes
Q7: The Teleostomi fishes consist of what three
Q8: Sharks have _ scales.
A)placoid
B)ctenoid
C)cycloid
D)ganoid
E)polyploid
Q8: The most diverse fish group is the
A)
Q9: 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
Q15: Shark reproduction and development involves
A)clearing a bottom
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