As a rule, they don't; however, some species have vestigal legs or bones that can be hidden within their bodies(ie: part of their skeletal system), while others like the Mudskipper have actual modified fins, etc. that work as functional legs and such which they use to make their way over land to get to new sources of water, among other things.
Well first think for yourself "Did evolution really happen?" then you can answer the question yourself.
Another name for a four legged animal is a quadruped.
There would have to be trillions of four-legged animals that exist on Earth.
a four legged animal is an animal that walks on four legs, scientifically called a quadraped.
Chickens come from the bird class of vertebrates. Vertebrates are animals that have a backbone. They are part of the phylum chordata. The other four classes of vertebrates are mammals, reptiles, amphibians, and fish.
They're important to evolutionary biologists because members of their group are thought to have given rise to the first four-legged land vertebrates.
All four-legged animals are called Quadrupeds, 'quad' - four; 'ped' - foot.
legroom, leggings, two-legged, four-legged
Well there are four Mammals, Fish, Amphibians, and Reptiles
They are all vertebrates, and the reptiles and amphibians belong to the tetrapods because they have four legs.
An impala is a mammal, a large antelope.An impala is a four-legged ungulate mammal, much like an antelope.
A Mexican walking fish otherwise known as an Axolotl is called a walking fish due to the fact that it has a fish shape, but it also has four legs which it uses to 'walk' on the bottom of the water.
Four legged