Edwin hubble discovered that:

cepheids have patterns of brightness.
stars have absolute and apparent magnitudes.
the planets move in elliptical orbits around the sun.
galaxies in the universe are moving away from the earth.

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