question_answer

Age of fossils in the past was generally determined by radiocarbon method and other methods involving radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary periods for different groups of organisms includes:

A)  study of carbohydrates/proteins in rocks

B)  study of the conditions offossilization

C)  study of carbohydrates/proteins in fossils

D)  electron-Spin Resonance (F3SR) and fossil DNA