Jellyfish
no, rats bones are truly unique. No other bones are like this.
They will the bones of animals after other animals have had their fill of the meat
bones from other animals
Vertebrates have backbones, other animals (besides vertebrates) don't have back bones.
Invertebrate animals are animals that have NO bones, such as crabs. Vertebrate animals are animals that HAVE bones, such as dogs.
Vertebrates are animals with back bones. Invertebrates don't.
All animals have bones.
It depends on which animal you are talking about. Some animals without bones are larger than animals with bones. Compare the Giant Pacific Octopus with a mouse.
The coccyx forms a really short tail in humans. It is related to a regular tail in other animals that have them.
Younger animals have a higher percentage of cartilage and other connective tissues.
Animals with back bones are known as vertebrates
Birds have pneumatic bones.