The geological time scale is divided up and organized according to what life forms existed on earth. true or false

The answer to the question of "The geological time scale is divided up and organized according to what life forms existed on earth. true or false" is true. The geolitic time scale is based on the fossil findings and the fossils are the remainings of the animals and plants that lived at different times - in one word, on the life forms that lived at the time.