do sturgeon have teeth?
454624
yes - and very nice eggs  .......very expensive eggs  :o)
139264
Sharks don't have skeletons made of bones, they have cartilage instead.
73492
Rocky is right.\n"Ivory" is just another name for dentine, which all mammalian teeth have. The interest in elephants and the rest of the animals mentioned is because they have dentine but lack enamel (the extremely hard outer layer of most teeth), therefore the entire tooth is available (except for the pulp cavity, of course). \nOther animals that have no enamel are for instance armadillos, aardvarks, and dugongs. Rodent incisors have enamel on the front surface only.
1126301
There are two basically different types of saber-tooth carnivores. Both are characterized by their extremely enlarged canine teeth. There are placental saber-tooth "tigers" that looked more or less like felids. The typical saber-tooth "cats" belong  to genus Smilodon. They were large carnivores but not as agile as cats, they were probably ambush-hunters.\nThis is the skeleton:\nhttp://www.dinosoria.com/mammifere/smilodon_002.jpg\nand this is a reconstruction (there are many that differ):\nhttp://www.abc.net.au/beasts/factfiles/primary_ff_displays/smilodon_1.jpg\n\nThe scimitar cat, represented by genus Homotherium, had similar appearance, but with shorter canines.\nThis is its skull:\nhttp://www.bluelion.org/images/BC_06_Homotherium_crenatidens.jpg\nThis is a reconstruction:\nhttp://www.paleocraft.com/images/homotherium.jpg\n\nThese animals inhabited North America during the Tertiary, and Smilodon spread to South America too. \n\nIn addition, there were also marsupial sabertooth mammals, represented by genus Thylacosmilus. These were convergent (evolved independently) and in their case, the enlarged canines were accompanied by the enlarged lower jaw. They were smaller than the placental forms.\nThe skull:\nhttp://www.caspercomsci.com/images/caspercollege/tn_FossilThylacosmilus_Atrox_jpg.jpg\nThe reconstruction:\nhttp://www.paleocraft.com/images/thylaatrox.jpg
515225
Monkeys have 1/1 canine teeth (per side) just like we do.  Many, such as baboons, have canines that actually look like canines instead of the incisor-like canines that we have.
1092109
there is some info here \n\nhttp://en.wikipedia.org/wiki/Prehistoric_fish
397720
I'm not sure whrer else it lived, but the sabre tooth tiger (smilodon) has been found in the La Brea tar its in Los Angeles and a full skelton is California's State fossil.,  See also the following site: http://www.bluelion.org/smilodon.htm
869538
One of the most significant changes that occurred in early vertebrate evolution is that of the development of jaws.  Jaws first appeared generally in gnathostomes, but more specifically in shark like ancestors called placoderms. Present day sharks are the representative group of early vertebrates with jaws. \n\nThere are two theories on why jaws first evolved. One theory ("new skull") states that jaws evolved to aid in more efficient feeding and feeding on larger prey, which increased metabolic rate and thus allowed for a more active lifestyle. The other theory, "new mouth", states that jaws evolved to allow for more efficient ventilation mechanisms, which allowed for a higher metabolic rate and thus a more active lifestyle. Secondarily in this scenario, jaws also aided in more efficient feeding.\n\nAlso, it should be noted that many animal groups that evolved prior to the early vertebrates has pharyngeal slits or pharyngeal openings. That isn't really a characteristic specific to vertebrates as several pre-chordate and chordate groups have pharyngeal/gill slits.
502659
The majority of small tooth whales are called dolphins.  They are mammals of the order Cetacea and the families Plantanistidae and Delphinidae and include about 50 species.  All have a beak like snout and sharp, conical teeth.  The term porpoise is sometimes applied to many of the same species, but porpoises, are members of the family Phocaenidae and have a blunt snout and spade or chisel shaped teeth.  The dolphin fish, is neither a dolphin nor a porpoise.  It is a sport fish related to the mackerels.
504128
Sharks do have backbones, as all vertebrates. Sharks do not have true bone, but their cartilaginous skeleton can be heavily calcified so that their vertebrae have the apperance of "bone" because they look like hard white cylindric spools. You might have seen their vertebrae made into necklaces and such by artisans. \nThis is what a shark trunk vertebra looks like:\nhttp://www.marinebiodiversity.ca/shark/english/porbeagle_vertebra__copy.jpg\nAnd without the neural and haemal arches they look like this: \nhttp://homepage.mac.com/mollet/Cm/BaskingSharkImages/basking%20shark%20vertebra%204.jpg\n\nAnd these are fragments of backbones:\nhttp://www.indonetwork.info/member/77806_backbone2.jpg\n\n(Notice the white color because the cartilage is calcified.)\n\nAlmost all the cartilaginous fish have backbones made of vertebrae (i.e. both sharks and skates/rays); the exception are the chimaeras or ratfish which do not have vertebrae, but retain a notochord (the primitive condition).
55149
No. Manatees lack both incisors and canines. See photo at the link.
357195
Panaque fish have spoon-shaped teeth which they use to rasp at submerged wood. Bacteria in their guts convert plant cellulose into nutritious chemicals.
417108
safety in numbers, being omnivorous we need several types of teeth for different foods. Also like sharks, we are apt to lose teeth, unfortunately unlike shark we cant grow them back. so separate teeth  mean that each one has a potential for not falling out
806285
Well, that depends on your definition of "tail".\n\nIf a tail is defined as an extension of the vertebrae (or notochord) behind the anus or cloaca, then most fish do have a tail.\n\nThere are some few exceptions, for example the ocean sunfish ( http://www.oceanlight.com/html/mola_mola.html). These fish don't have a caudal fin with normal tail vertebrae; it is replaced by modified caudal elements. This condition is known as "gephyrocercal" (http://www.briancoad.com/Dictionary/DicPics/gephyrocercal.htm).\n\nIf, however, you're thinking of a typical caudal fin, there are many fishes without them, such as eels and other anguilliform species. However, they usually do have caudal vertebrae (it is the membrane that they lack).
569073
none.  They are mollusks.  They do have those hard little beaks, but those are not bones any more than a bird's beak is a bone.
1154928
OH, you mean CANINE TEETH.\n\nSpelling is important if you wish to be understood child.\n\nFirst off snakes don't have canines. Most mammals do have canines, including humans.\n\nCanines are the elongated, sharply pointed teeth near the front of the jaw. They are commonly called fangs although that name is incorrect since fangs are hollow teeth and canines are always solid.\n\nCanines are designed to allow predatory animals to grasp prey. They are sharp so they can puncture skin and muscle when the animal bites, and they are long so that when they go in they won't slip out until the animal opens its jaw.\n\nSome herbivorous animals also retain their canines from their more carnivorous ancestors. The largest canines belong to the African hippopotamus, and although hippos are vegetarians their canines are over a foot and half in length. Hippos use their canines for fighting other hippos rather than for catching prey.\n\nCelbone canines are not used for tearing. They are used for gripping. The incisors and premolars and incisors are used for tearing.
132068
Because they never stop growing them. Their survival has evolved to depend upon their teeth, so their supply of teeth never ends. They have row after row of teeth, which keep growing back as they are lost. If you lost teeth like a shark did (because yours don't grow back), you'd have dentures by the age of 22.\n\nGood Luck!