10.5 Evolutionary Biology Today Review-What is the difference between pure science and technology? New technology is furthering our understanding of evolution. 10.5 Evolutionary Biology Today 7. Biochemistry-Molecular and genetic evidence support fossil and anatomical evidence called molecular clocks • Two closely-related organisms will have similar DNA and RNA sequences. • Genes and proteins with matching sequences. 10.5 Evolutionary Biology Today 8. Physiological Adaptations • Changes in an organisms metabolic processes that help survival Bacterial resistance to disease Pesticide resistance in plants 10.5 Evolutionary Biology Today Chromosome comparisons 10.5 Evolutionary Biology Today • Pseudogenes are sequences providing evidence of evolution. – no longer function – carried along with functional DNA – can be clues to a common ancestor 10.5 Evolutionary Biology Today Breeding behaviors • Month of year • Calls 10.5 Evolutionary Biology Today • Homeobox or Hox genes indicate a very distant common ancestor. – control the development of specific structures, cell differentiation in embryonic stages or larval stages Ex. Eye spots of marine worm • Protein comparisons, or molecular fingerprinting reveals similarities among cell types of different organisms. 10.5 Evolutionary Biology Today Evolution unites all fields of biology. • Scientist from any fields contribute to the understanding of evolution. • The basic principles of evolution are used in many scientific fields.