development of evolution theory

• Resistant bacteria is an evidence for evolution:

  1. Random mutation occur in the genes of individual bacterial cells.
  2. Some mutations protect the bacterial cell from the effects of the antibiotic.
  3. Bacteria without the mutation die or cannot reproduce when the antibiotic is present.
  4. Bacteria with mutation reproduce at a fast rate.
• In order to reduce the rate of development of antibiotic resistant strains:

  • Doctors should not prescribe antibiotics inappropriately, such as for the treatment of non-serious infections.
  • Patients should always complete the full course of antibiotics to ensure all bacteria are killed and none survive to mutate and form resistant strains.
  • The agricultural use of antibiotics should be restricted.
• Rock fossils are also an evidence of evolution.
• Pentadactyl limb suggests that most vertebrates descended from the same common ancestor.