Explain some of the factors that make it difficult for geologists to learn about the precambrian era?
can you , really

There is not much Precambrian strata preserved and very few species.  At this particular time, the earth, and the creatures in it, were still evolving and fossils were difficult to trace and record.  There was also a noted mass extinction that occurred.  Also, many Precambrian rocks have been heavily metamorphosed, obscuring their origins, while others have been destroyed by erosion, or remain deeply buried beneath Phanerozoic strata

Pro insulin undergoes extensive posttranslational modification along the production pathway .

Heyhonestly, probably not. humans have always had a tendency to waste things. whether it's food, cosmetic, infrastructure, or our abandoned constructions,the landscape is littered with the refuseof man. archaeology wouldn't be a developed discipline if humans didn't leave things behind. in a way it makes us human

hope it mark me as brainlieast.