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5.  glycolysis, the tricarboxylic acid cycle, and oxidative phosphorylation

6.  If oxygen is not present, some organisms can undergo fermentation to continually produce ATP. Glycolysis, which is the first step in all types of cellular respiration is anaerobic and does not require oxygen.

7. Glycolysis is the process in which one glucose molecule is broken down to form two molecules of pyruvic acid

Explanation:

his research revealed two genetically different groups of prokaryotes, which justified splitting kingdom monera into two kingdoms. the genetic and cellular differences were so great, that these two kingdoms were eventually placed into different domains in the current three-domain system.