infer How does a backbone that can bend help an animal to move?
822252
Since it bends it can run faster. E.G a cheetahs back bone helps it run fast it bends quickly and smoothly.
718204
the mighty elephant has a special foot design. it walks on its tip toes .the elephants foot is designed to step first with his toes then the pad of the foot covers the area that it is stepping on and then take his step this muffles the sound of breaking stick under foot making the elephant very quit as it walk Thur the jungle
914899
Mistress is right.\n\nwhen we look at quadrupeds, what we see is very confusing, because the length ratios between the different parts of the bones are much different from ours.  for instance, if you look at a dog's hind leg, it would appear that it's knee bends backwards, but what you are really looking at is it's ankle: dog's femurs are much shorter than ours, so they almost "hide" in their fur.\n\nThe same is true with the front legs of other quadrupeds.  Look at this picture of a deer: http://www.exzooberance.com/virtual%20zoo/they%20walk/deer/White-Tailed%20Deer%20104024.jpg\n\nAt first, one would think that the deer is sticking it's front leg knee out the furthest, but if you look at it's bone structure, you will find that what appears to be his knee is much more like a wrist (with the hoof being the "fingers" and the bend closest to the deers body being the "elbow")\n\nElephant front legs (http://www.elephant-village-pattaya.com/images/Elephant.jpg) \nin comparison to deer front legs, look remarkably like a human's (as side from the giant foot and grey wrinkly skin and ... well you know.).  Elephants (and rhino's too I believe) are the only quadrupeds that truly have 4 "knees" when comparing their anatomy to a Human's anatomy.
378634
Chickens' legs bend the same way as ours do. However, it may appear the opposite because the joint that we can see outside its body is the ankle and not the knee. \nThe femur of birds is relatively short and is inside the body, thus it's not visible. The second segment of the leg is a composite of their tibia and some tarsal bones, and it articulates with the third segment, formed by other tarsal bones fused to the metatarsals. \nHere's a picture of a bird skeleton:\nhttp://www.infovisual.info/02/img_en/056%20Skeleton%20of%20a%20bird.jpg\nAnd a photograph of a real one:\nhttp://a-s.clayton.edu/biology/biol3650l/skeletal/bird/bird-lateral.jpg\n\nNow, the next time you have chicken (or turkey) for dinner, you can have a little dissection entertainment! Bear in mind that the parts of the leg that you eat are the first segment (the largest one, you'll see the femur that was articulated to the axial skeleton) and the second segment (the tibiotarsus, also fleshy because of the muscles). \nIn contrast, the third segment (tarsometatarsus) does not have muscles, but tendons that go from the muscles to the fingers. This part is usually covered with scales and is not included in commercially prepared chickens.\n\nHave fun!
154330
erm, they have claws and teeth that help them catch prey. They have two eyes pointing forward that helps them to see prey adn assess the distance to it better than if they were on the side of the head.
564063
If you are just talking about BONE, then these things make up the AXIAL SKELETON of a VERTEBRATE ANIMAL
313481
It is because they are most grounded that way. When they sit in a stable place their legs and the wire itself carry the same voltage. That is the reason they do not get electrocuted. If the same bird were to put one of its legs on a cross wire or a different wire at the same time, they would lose the electrical balance because the charge would then be able to pass through their body. The way they sit allows the current to pass throught the bottom of their claws and not into their body. Any other way and they would get electrocuted.
194985
NO THEY CAN NOT!!!! My mother proved this at West Virginia University in the 1960s by walking a cow UP the stairs of one of the sciences buildings. The instructor said they "could" and she knew otherwise. Cows lack depth perception and will NOT walk down stairs. They had to get a crane to lift the cow out of the building.
761221
Bird: How does the bird's vertebra indicate that it evolved to support flying? (Answer: The thoracic vertebrae are fused to provide a rigid upper shell to withstand the muscular forces of flight muscles. As partial compensation for this rigidity, birds have more neck vertebrae than many animals to provide enough flexibility to feed, groom, etc. See ref. 1.)\nSnake: How does the snake's vertebra indicate that it evolved to support slithering? (Answer: Snakes have a large number of vertebrae, which are connected together by ball-and socket joints. These characteristics allow extreme flexibility. Together with specialized muscles, the vertebra enable the snake to move with speed and agility. See ref. 2.)
585562
Horses weigh 2000 pounds.  Their ankles (where most breaks occur) and lower legs are as thin or thinner than ours.\nThat is one reason.\nThe second reason is that in order for a bone to heal properly it has to be stayed off of.  Horses are unable to stay off a leg for the length of time it takes to heal a bone.  So they would end up breaking it over and over again.  Thus, when a break is too extreme, the horse is put down.
752968
Your vertebrae are the bones making up your backbone.
708343
Flexibility can come from cartlidge, tissue, and muscles which are attached to the bones. Bones aren't flexable at all really.\n\nMultiple Vertebre make up our spine\n\nMultiple: scholiosis, displaced vertebre, muscle issues, nerve problems, spasms, hernea
731589
Well To solve this problem, you need to break up forces in x and y components. Once you find both x and y components, you can find magnitude of force and direction ken must pull. \n\nTo keep the bear from moving, some of the forces (in both x and y direction) equal to zero. \n\nSo, sum of the forces in X-direction = 350sin(60) - 400sin(45) - F(in x direction) = 0\nSum of the forces in y-direction = 400cos(45) + 350cos(60) - F(in y direction) = 0\n\nSolve for F(in x direction) and F(in y direction), you will get these: F(in x direction) = 20.266 lb east and F(in y-direction) = 457.84 lb south\nTo find magnitude = ||F||= sqrt((F(x))^2+(F(y))^2) = 458.29 lb\n\nTo find angle= tan(theta) =(F(y))/(F(x)) where theta is the angle\ntheta = arctan (F(y)/F(x))= 87.5 degree east south\n\nSo Ken must pull the rop with force 458.29 lb in the direction East 87.5 degree South to keep the bear from moving. \nI think this is right. Good Luck.!!!
841597
If it's a serious answer you want then it's a pen to put sheep in. It's usually made of wicker hurdles and is of a temporary nature but it could also be a permanent steel structure. If you want a funny answer I can't think of one.
722335
i would say it's the shape of the pelvic bone.  gives stability to their body shape and movement.
392474
Based on your drawing, it suggests that the red bar is attached at the heavy weight and pivots about that axis, giving the path suggested by the blue arrow.  That would be along the lines of a wheel & axle.  For the red bar to be a pendulum...it would pivot about the point at the top.  This would make the heavy weight swing back and forth in a path like a "smile".  A pendulum resembles the classification of a third class lever.
93177
Standard harness in the US and Europe used a horse collar and hames attached to the "tree" of the wagon. The horse pushed with its shoulders against the harness and in turn, pulled the wagon. The actual force exerted by the horse was a push.