When darwin was developing his ideas about natural selection, in what area did he have a limited understanding?

Explain how fossils scientists make discoveries about the lives of organisms and about how environments have changed over time. plz hurry up it time

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen