what has 5 legs, only walks backwards, and has no mouth but 2 lips?
347498
A terrified and wounded ant.
1071434
A penis with lips? What the...
1008368
With legs, they usually walk.  \n\nElsewise, they fly, crawl, or swim.\n\nDuh.
304885
Star fish have five *arms* (or, sometimes, multiples of five or six arms).  Their legs are called "tube feet" and are found in the grooves under the arms.  They have an even number of them!\n\nMost animals have an even number of legs because they are symmetrical along a single axis, so both sides end up looking the same.  The only way to have an odd number would be to not be bilaterally symmetrical (and the only animals who aren't don't have legs!) or to have a leg in the middle, which wouldn't be much use.\n\nThe only "exception" to this would be an insect-like animal called the springtail.  It's not really a leg, but they do have their abdomen bent over and underneath them.  They use it to spring very high into the air, so you could call it a leg of a sort.  Sprintails are neat.  They are very common, but most people never notice them because they are mostly quite small.
331815
A camel... but without the humps :)
14754
Man, of course! In King Oedipus (Sophokles), the same question is asked by the Sphynx. You have 4 legs when you are a baby (you can't walk, it's the morning of your life), then you walk on 2 legs later on, and when you are old, your third leg is the stick you lean on.
212442
Koala bears.  \nThey extract moisture from leaves and never touch water.
482129
it is aquestion of anatomy.  humans are mammals and we evolved from 4 legged animals.  apes also can walk on two legs but we have adapted further because our pelvis has evolved into a more upright posture with the hip joints facing dowmwards and is more shorter, to allow attachment of the ligaments and muscles that are neccessary for this walking mode.  our spine also has the s bend curvature to give the shock absorber effect.  if u look at mammal skeletons u can see these differences.  the abilty to walk upright and maintain coordination is enhanced by the growth in the frontal lobe of the brain cerebral cortex.
170581
A dog (usually) has 2 eyes, 4 feet, and 1 tail.
102233
Any animal with six letters in its name.  Monkey.
435515
Its an axolotl, with an "a".
177148
"A thing there is whose voice is one;\nWhose feet are four and two and three.\nSo mutable a thing is none \nThat moves in earth or sky or sea.\nWhen on most feet this thing doth go,\nIts strength is weakest and its pace most slow."\n\n"There walks on land a creature of two feet, of four feet, and of three; \nit has one voice, but sole among animals that grow on land or in the sea, \nit can change its nature; when it walks propped on most feet, then is the \nspeed of its limbs less than has ever been before.\n\n"A thing there is whose voice is one;\nWhose feet are four and two."\n\n"What goes on four feet in the morning,\n two feet at noon, \n and three feet in the evening?"\n\nHuman. (It was a baby, then a man, then finally grew old.)
809550
A centipede has a pair of legs for every segment of its body.\nThis makes it differ from millipede which has at least two pairs of legs for every segment
850752
WHAT'S GOT 100 TEETH AND HOLDS BACK A MONSTER?\n\n\nMY FLIES!
188000
It has no cell wall and it locomotes.
656816
pigs are unguligrade, they walk on two digits\nHumans are plantigrade\n\nPigs have a spiral ascending colon\nHumans have a simple ascending colon\n\npigs have hoofed digits\nhumans don't\n\npigs have an os rostrum (bone in their nose)\nhumans don't\n\npigs have no nuchal ligament, incomplete bony orbit, tusks/ canines grow throughout life, no clavicles, and 14 teats\n\nhumans have nuchal ligament, complete bony orbit, brachydont teeth, clavicles and two teats\n\nI don't know much about human anatomy (only animal) this is all I could come up with off the top of my head
114337
Centipedes very, very rarely have 100 legs. Most have between 20 and 50. Some have as few as 8, and a handful of species have 100 or more.