Muscles cells contract as actin filaments slide across the surface of myosin filaments, causing the ends of the muscles cell to pull together. this process requires energy in the form of ATP. which process explains how energy is made available for muscle contraction

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