Variation, adaption and evolution

• What is darwins theory of evolution?

  -random mutations result in variation

  -some organisms are better adapted to environment

  -These compete (survival of the fittest)

  -Those better adapted are more likely to survive; over time those desirable features become more pronounced.
• how is Antibiotic-resistant bacteria used as evidence for Darwinian evolution?

  If not all bacteria are killed, those more resistant will reproduce, this is why a full course of antibiotics must be completed.
• Selective breeding?

  Breeding organisms that have desired characteristics to produce offsprings in which they are more pronounced .