Are you talking about shark skeletons?
Yes, they are bones. However, they are made of a different, softer material, than most bones from other animals - cartilage.
the cell wall is made of plastic the cell wall is made of plastic The cell wall is not made of plastic, but it is made of a nonliving material.
Soil is made up of broken down pieces of living and nonliving earth material. Living material can include plant matter, organisms, and bacteria, while nonliving material can include rocks, minerals, and organic matter.
Glass is made up of silicon and oygen. SiO2.
Trees and anything made of wood.
Originally an iron structural skeleton, with a sheet-copper skin.
All sponges have a skeleton made of a protein called spongin or mineralized structures composed of calcium carbonate or silica.
Toenails are considered nonliving structures, similar to hair. They are made up of a protein called keratin, which is produced by specialized cells in the body. Once the cells have produced the keratin, they die and the keratin becomes the hard, protective material that forms the toenail.
Yes. Given the proper mixtures of carbon dioxide, water, ammonia, etc., you can add heat or an electric spark (energy), and get stable organic molecules, such as amino acids quite easily. Such is an example of the creation of organic material through nonliving means.
Sharks are cartilaginous fish. The term "cartilaginous fish" means that the structure of the animal's body is formed of cartilage, instead of bone. A shark does not have one bone in it's body. It's skeleton is made up of cartilage. Cartilage is a tough material, like the material that shaped your ear.
Coral Reefs have clear bodies that are white skeletons :PP
It has no DNA, no living organs like the brain that is part of life. It is made of rock. It is organic material.
As with all arthropods, it has an exoskelton.