"what do george washington and cleopatra have in common? well they are just two of the many different people who have braided their hair over the centuries." the technique used in this introduction is

Which of these is not an example of molecular homology? 1. use of dna and rna as genetic material 2.use of glycolysis as the first step in cellular respiration in both plants and animals 3. the lack of an igf-1 gene in prokaryotes 4. the use of aldolase b to break down fructose in bacteria, plants and animals