L3A
L3B
27.1 Structural and functional adaptatioins contribute to prokaryotic   
       success
27.2 Rapid reproduction ,mutatioin , and genetic recombination promote 
       genetic diversity in prokaryotes
27.3 Diverse nutritional and metabolic adaptations have evolved in prokaryotes
27.4 Molecular systematics is illuminating prokaryotic phylogeny
27.5 Prokaryotes play crucial roles in the biosphere
27.6 Prokaryotes have both harmful and beneficial impacts on humans