Go eat chicken and do the hookey pookey
Proteins are made in every living cell, in every living organism. Living cells and living organisms are made of older cells/organisms.
Fungi and protists
Prokaryotic cells are older than eukaryotic cells.
As we get older, the pigment cells in our hair follicles gradually die. When there are fewer pigment cells in a hair follicle, that strand of hair will no longer contain as much melanin and will become a more transparent color.
The first living cells had to be autotrophic because if they were not then they would die, autotrophic bacteria produce oxygen and can live in our older Earth's climate. Any other would die from a lack of oxygen.
Most individual cells within multi-cellular organisms have a finite lifetime. As cells wear out or die, they must be replaced by new ones. Cells in simpler organisms will reproduce by division, leaving one older cell and one newer cell.
of course they are
As we get older, the pigment cells in our hair follicles gradually die. When there are fewer pigment cells in a hair follicle, that strand of hair will no longer contain as much melanin and will become a more transparent color like gray.
Prokaryotic cells are generally smaller than eukaryotic cells. Prokaryotic cells lack membrane-bound organelles, such as a nucleus, which allows them to be more compact in size. Eukaryotic cells, on the other hand, are larger and have membrane-bound organelles that compartmentalize different cellular functions.
well, I dunno what exactly you mean, but ok, I will speak about living organisms... In your body are cells. These cells are short-livers. Because of that they still copy themselves (reproduction). But if you do copy of the copy of the copy of the copy, the cell loses its quality, because of that you are older and older. You can try it on your copy machine. Just make copy of copies.
Stratified squamous epithelium
Your cells divide.