yes
They did and still do have bones.
Yes, Amphibians are Vertebrates which are animals with backbones.
Yes, all amphibians have bones.
amphibians does have a sense of smell
Strong and flexible tail, light weighted bones or sharp claws and strong feet.
The type of muscles that wrap around bones are typically skeletal muscles, but muscles do not make the bones light. What makes bones light are the fact that they are porous. There are a lot of holes within the bones that make it lighter, but those holes make sort of arcs and what not, similar to those in the Eiffel tower, for example. They are light weight, but very strong.
bones can be strong and healthy !!!!!!!!!!
because their limbs and bones are stronger than those of amphibians
yes
Endoskeleton - they are vertebrates and their bones are inside!
No. Amphibians have bones, including a backbone, as they are vertebrates.
bones are the strongest part of your body as well as the hardest part they protect you but they are a little heavyer then light their more like sort of light for some but some can be more then light. mid way for light EDIT: Yes it's true. The stucture of the bone contains calcium and phosphourus that help make them strong, yet lightweight.