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.