life on earth .. a little help (1 Viewer)

[j.A.z]

i made the silly mistake of choosing CYANOBACTERIA and i am having trouble finding the past environment and what conditions were like on earth when they evolved

ive tired everything
if anyone can help i would be so happy
and very greatfull

jen

 

[Survivor39]

Have a look at this abstract of a scientific paper.

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9611770&dopt=Citation