How many orders of living sharks are commonly recognized?
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- Hard Hard difficulty.
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Which shark is widely described as the largest known luminous vertebrate?
Answer
Kitefin shark
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What is the hammer-shaped head of a hammerhead shark called?
Answer
Cephalofoil
- Intermediate Intermediate difficulty.
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What valve-like structure in a shark's intestine increases nutrient absorption area?
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Spiral valve
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Which tiny deepwater species is often cited as the world's smallest shark?
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Dwarf lanternshark
- Intermediate Intermediate difficulty.
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What scientific superorder contains the living sharks?
Answer
Selachimorpha