Lab 4 - Lab 4 A The siphuncle reached all of the chambers...

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Lab 4 A. The siphuncle reached all of the chambers. This is because it connects all of the chambers together and also empties water from all the chambers to change the density and in tern change the buoyancy. B. Younger ammonites need to be more camouflaged because they are younger and weaker and need better protection from predators. These tiger stripes camouflage from both the top and the bottom. C. On the Nautilus the siphuncle is on the inside; on the ammonites the siphuncle on the outside of the chambers. D. Both the Nautilus and ammonites have the same basic shell design, which indicates that they have similar buoyancy control systems. E. The spines are most likely there to protect from predators. F. If the spines and chambers were connected and a spine broke off, the whole interior would flood with water. This would reduce the ability to control movement and buoyancy. G. I would expect the spinose ammonites to be slower because of drag. H. The straight cone cephalopods were faster and able to move well in Open
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  • Winter '10
  • MORRIS,M.R./FRISCIA,A.R./MOLDWIN,M.B./VANVALKENBURGH,B
  • Cephalopod, Nautilus, Ammonite, Siphuncle, similar buoyancy control

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Lab 4 - Lab 4 A The siphuncle reached all of the chambers...

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