Because of the way their spine is. It just happens that way, it's the adaptation those snakes had to make.
Yes. Some pets (e.g. snakes) are not allowed at all.
Zigzag, Zebra, Zephyr, Zucchini.
zigzag
The Sidewinder rattlesnake moves laterally (as do some other - mostly desert living - snakes)
save some stuff before you move so when you move you have something to do. if you have a pet play with them.
only some by moving there flagellum back and forth
Yes; some researchers say that when the head of a snake is cut off, it will move or slither around for about 5-10 seconds.
Yes, some species of snakes, such as garter snakes, may carry their young in their mouths to move them to safer locations. This behavior is a protective measure to keep the baby snakes safe from predators.
Snakes use the scales on their bellies like little feet to push their bodies along the ground. Muscles in the snake make the scales move forward where they will grip the surface they are moving across then they are pulled back moving the snake forward.
Snakes have four ways of moving around. Since they don't have legs they use their muscles and their scales to do the "walking".Concertina method: this is when snakes bunch themselves up and then throw themselves forward.Serpentine method: This motion is what most people think of when they think of snakes. Snakes will push off of any bump or other surface, rocks, trees, etc., to get going. They move in a wavy motion. They wouldn't be able to move over slick surfaces like glass at all.Sidewinding: This is a difficult motion to describe but it is often used by snakes to move on loose or slippery surfaces like sand or mud. The snake appears to throw its head forward and the rest of its body follows while the head is thrown forward again.Rectilinear Method: This is a slow, creeping, straight movement. The snake uses some of the wide scales on its belly to grip the ground while pushing forward with the others.Source: Kidzone
False.
The only animals besides snakes that are considered to be "serpentine" in shape are spiders and beetles because of the way their legs are formed and move.