Amphibians

Traditionally the amphibians have included all tetrapods that are not amniotes. They are divided into three subclasses, of which two are only known as extinct subclasses: * Subclass Labyrinthodontia (diverse Paleozoic and early Mesozoic group) * Subclass Lepospondyli (small Paleozoic group) * Subclass Lissamphibia (frogs, toads, salamanders, newts, etc.)
Amphibians birds and reptiles are in the tetrapods class
The class of an amphibian is Amphibia
Amphibia.
The class is called amphibia.

You did not say which species of frog so I will tell you of one particular frog. The southern cricket frog of South-eastern borth America can lay as many as 250 in ditches and ponds.

Most species of frogs can lay hundreds of eggs at a time.

Amphibians don't have amniotic eggs - their eggs don't have shells, and they have to be laid in water. In general, amphibians are more dependent on water, most of them having aquatic larvae and having to keep their skin moist even as adults in order to breathe through it.

They use their back feet which they have alot of muscle strenght in the back legs

Amphibian evolution

boogles

You are referring to caecilians. They actually look more like giant earthworms than they do like snakes. They are rarely seen because they burrow underground.

They won't move and after a few days they will start to rot and look like they have somthing growing on them.

Yes, pet toads will hibernate by burrowing themselves in the dirt. Though I've heard that if you keep your pet toad warm during the winter like it would be during the summer then it won't hibernate, but won't live as long.

they don't really fall off, more accurately they are slowly absorbed by a frogs body as they change it gradually grows shorter until it disappears, Occasionally small frogs are found stil in development with a tiny stub of remaining tail

Vertebrates. They are salamanders. Salamanders are amphibians. Amphibians are vertebrates. Like us (and unlike insects, snails, and jellyfish) they are descended from ancestors with backbones.

Axolotls can change from aquatic animals to land animals. And also, they only live in one lake in Mexico so they are all Mexican and therefore there is no need to write 'Mexican' in front of 'axolotl'.

Since frogs spend most of their lives in water there is a huge advantage to having a redundant system of getting oxygen. The need for a frog to be able to breathe without surfacing during the winter months makes "skin breathing" very advantageous. The use of lungs is effective when the frog is on the surface (especially when completely out of the water).

Amphibians hatch out of an egg with no shell.

Frogs are good sources of pest control.

They all have the same bones, albeit evolved to suit different needs.

Yes, All amphibians must lay their eggs in water. If they lay them on land their eggs will dry up.

I have never kept them but at least a 30ltr tank is advised by experienced growers for one Axolotl and an extra 10 ltrs needs to be added for each extra Axolotl.
an axolotl tank should be at least 10 gallons.

the two major group of amphibians are the tailed amphibians and the tailless amphibians

They don't get fed, but you do with your egg sandwich

Salimanders

toads

You need to check your state wildlife website to see what exotic pets are lawful and unlawful to own. If it doesn't specify on the website, contact them. It depends on what state you live in. I know you can own them in my state, MA.

Typically found in a wide variety of habitats