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

• Scientist from any fields contribute to the understanding of evolution.

• The basic principles of evolution are used in many scientific fields.

Evolution unites all fields of biology.