The abundance of O2 led to the evolution of Naim 08:01 AP Biology The abundance of O2 led to the evolution of a. anaerobic eukaryotes. b. aerobic eukaryotes. c. anaerobic prokaryotes. d. aerobic prokaryotes. e. Both b and d Answer: e. Both b and d Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+