Which animal has the shortest spine?
459398
Of adult animals that have a spine (i.e. the vertebrates), the smallest one, with the shortest spine would probably be a male Stout Infantfish (Schindleria brevipinguis) which can be only 6.5 mm long (head to tail) when sexually mature.  The spine of the infantfish would be a bit shorter than that, taking into account the size of its head and tail.\n\nWhether or not you count larval fish (which can be microscopic) depends on whether or not you consider them to have a complete spine.
74288
According to several websites is the following: "The smallest known monkey is the pygmy marmoset, with an average size of 3.6 inches and weight of 6.6 ounces."\n\nA close second is the "sagui dwarf" which "measures only 4 inches and weighs around 5.6 ounces ..."\n\nThe smallest primate (not monkey) is the mouse lemur. "National Geographic Ultimate Explorer Correspondent Mireya Mayor with a new species of mouse lemur she and her team discovered. It may be the smallest primate in the world."
76547
An amoeba is the smallest animal in the world. It is a single cell organism. This means it has ONLY one cell in its whole body and insides.
295910
I am willing to bet that you are looking for the Elephant.  There are many sites on the web which have stated that the elephant is the only mammal which can not jump.  This is NOT the truth.\nJust on the Web alone there are several others listed including the okapi, guinea pig and raccoon who are also reported as not being able to jump.  (see references).\nIn the same class as the elephant, both Hippopotamus and Rhinoceroses come closer to skipping than jumping.  Like the elephant, their body mass is too great in relation to their mass.\nIn addition, all bats have weak legs and usually have trouble walking, let alone jumping.\nIt has been recorded that sloths move too slow to jump.  Plus they seldom climb down out of their trees.\nGiraffes are known to run, but apparently always have one “foot on the ground.”  Due to their neck structure, it may not be possible for them to jump in the usual meaning of the word.\nDue to their odd physical shapes and relatively slow speeds, echidna (spiny anteater), \nduck-billed platypus and koala might also be listed among the non-jumpers.\nFinally, there are the non-land mammals most of which can come at least part way out of the water, but none have legs and by definition, can not jump.  These would include whales, porpoises, dolphins, manatees and maybe even sea lions.
26858
Cheetah is the fastest animal on land.
316505
The only living chordates that do not have backbones are the "protochordates", that is, the members of phyla Urochordata or Tunicata (sea squirts) and Cephalochordata (lancelets). These chordates have the primitive support structure, a dorsal notochord. \nAdult Tunicates lack notochords, except for the planktoninc and tiny Appendiculaceans.  Tunicate larvae (known as "tadpole larvae") _do_ have a notochord that supports their tails. \nThere are many genera and species of Tunicata; so if you do a Google Image search for either "Tunicata", "Urochordata" "sea squirt" or "salp" you'll get many good photographs.\nOn the other hand, the lancelets are much less diverse. Almost all are included in genus Branchiostoma, so if you look for "Branchiostoma" or "lancelet" you'll get what you're searching.
363159
My favorite least-favorite frightening critter would be Dranunculus, a worm that lives in the Nile.  it bores itself into through the skin and grows inside blood vessels.  It can reach dramatic lengths in the meter range.  Diagnostic approach:  you check blood vessels in eye lid for worms wiggling around in it.  In antiquity, people would make a cut in the vein and pull the worm free and roll it upon a stick.  Might be the origin of the Esculap.\n\nThere are other parasites that scare me.  Not the big critters.  i used to work on sharks, and I would take one of them guys over a worm any day of the week...
392382
Rex.\n\nEveryone knows that THE saurus is the tyrannosaurus rex, so we simply use "Rex" for short.
855593
I would look here for your answer and/or a link that could get you your answer http://en.wikipedia.org/wiki/Vertebrate\n\nGood Luck!!!
167023
Kingdom: Animalia (is an animal)\nPhylum: Chordata (has a notochord at some stage)\nSubphylum: Vertebrata (has a spinal column - backbone)\nClass: Mammalia (is a mammal: warm-blooded, suckles young with milk)
4111
Snakes have a reduced or absent left lung; the right lung is long and extends along much of its trunk; it looks like a pink elastic and many-celled pantyhose.\n\nBoas and pythons usually have two functional lungs.
1117595
There are a few basic body types among mustelids: ferrets, weasels, minks, fishers, otters and martens all have that cylindrical long sinuous body and do the fast inchworm-hop run; badgers, wolverines, and skunks have broad flat heads and bodies and trundle or waddle along.\nSo if it runs like a ferret but is all-over dark, it may be a stoat or a polecat--depends on where you live and the size of the animal. See link as well.
478788
Its definately an OSTRICH! they are the only animals or birds that have a brain smaller than their eyes!
918405
The pectoral girdle of turtles,terrapines, and tortoises lacks the breast bone or the Sternum, whereas the other tetrapods have a well developed Sternum, to which the ribs are attached anteriorly.\n\nThe difference exists because turtles have a shell , like the tortoises , which is used as a defensive covering. since, the weight of this shell is added to their thorax , if sternum wouldve been there, it wouldnt be able to bear the entire weight. so, instead of that, their ribs are directly present in circles. the more the no. of bones, the more weight they can share together instead of a single bone .
31274
Most, if not all mammals are vertebrates.  That simply means that they have a backbone or a spinal column.  An example of an invertebrate would be an octupus.  Hope this clears it up a bit!
55149
No. Manatees lack both incisors and canines. See photo at the link.
854620
no, sharks are NO invertebrates, they got a spine