Search Results for: Animals fats chemically modified
abundant, macroscopic, hard-shelled fossils , roughly million years ago (mya), to the present time. preceding the phanerozoic eon is the proterozoic eon, with the boundary between the two eons being determined by the "sudden" appearance in the fossil record of a majority of the skeleton-bearing phyla of animals
phanerozoic derives from the greek meaning, visible life, referring to the large size of organisms since the cambrian explosion . the time span of the phanerozoic eon includes the rapid emergence of a number of animal phyla, the emergence of terrestrial plants , complex plants, fish , and terrestrial animals...
https://www.newworldencyclopedia.org/entry/Phanerozoic