Keratin
Coal is a non-living substance.
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.
Urea is the substance derived from protein metabolism that is removed from the blood in the kidneys and excreted in urine.
One example of a natural nonliving substance that comes from the earth is minerals, such as quartz or mica, which are formed through geological processes. These substances do not have biological origins and are found in various parts of the earth's crust.
An antibody is a highly specific protein that attaches itself to a foreign substance.
Fibrous!
well, I think you meant "are protein living or nonliving". and they are nonliving
Keratin is the nonliving waterproof substance that replaces the stratum corneum.
Coal is a non-living substance.
well, I think you meant "are protein living or nonliving". and they are nonliving
minerals
Yes, a substance can have fat and protein. Milk has fat and protein.
Rock.
H2O (water) is a nonliving substance. Living organisms, such as plants and animals, require water to survive, but water itself is not alive.
If you mean what are viruses then they are nonliving strands Rna surrounded by a protein coat
keratin
protein