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· Sharks have a spiral valve intestine. Explain why the size and shape of the spiral valve is important in its function.· Explain how a shark’s oil-rich liver helps keep them afloat.
· Sharks have lots of small sensory pore scattered over their heads. Explain how these pores, called “ampullae of Lorenzini,” helps sharks sense bioelectricity (their sixth sense).
· Where are sharks taste buds located (hint: there are two places)?
· Explain how the shark’s olfactory (smell) organs work.
· What is a “nictitating membrane” and what does it do for sharks?
· Do salmon sharks have a lateral line system? If so, how does this system give the shark tactile clues about its environment?
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· How fast can salmon sharks swim?· Why do sharks have zigzag bands of tail muscles? How does this orientation of muscles help the shark swim?
· Salmon sharks are considered opportunistic predators. What do they eat (make a list)?
· Are salmon sharks viviparous, oviparous, or ovoviviparous? What does this mean for their reproduction?
· What are dermal denticles? How is this an advantage to sharks (hint: think about sharks swimming)?
· Explain how “countershading” is a form of camouflage for sharks.
· Do salmon sharks stay in Alaska all year? If not, where else do they go?