Plant fibers are primarily composed of which substance? * 1 point
Plastic Polymers
Keratin
Cellulose
Nucleic Acids

Ifound this on google “aristotle (384–322 bc) in western scientific taxonomy the greek philosopher aristotle was the first to classify all living things, and some of his groups are still used today, like the vertebrates and invertebrates, which he called animals with blood and without blood.” i hope this you for what your looking for.

Carbon-14 has a half-life of 5,730 years and most igneous rock is older than that.