evolution

• Evolution


  A natural process though to be responsible for the almost 1.5 million (maybe 2 million) different species of life forms that inhabited and are inhabiting our planet
• Evolution


  A change in the genetic make-up of a population over time
• Charles Darwin's theory of evolution through natural selection


  • Inheritable variations occur in individuals in a population
  • Due to competition for limited resources, individuals with more favorable variations (phenotypes) are more likely to survive and produce more offspring
  • The offspring that carries the trait reproduces, passing the traits to future generations
• Mutations


  Changes in DNA
• Recombination


  Occurs during meiosis
• Evolution


  The process by which species of organisms undergo genetic changes over generations, resulting in the development of new species
• Darwin's Theory of Evolution


  • Species change over time in response to environmental pressures and competition
• Charles Darwin's theory of evolution through natural selection revolutionized the field of biology and remains one of the most influential scientific ideas of all time
• The idea of evolution has been present in human thought for centuries, with early theories developed by ancient Greek philosophers and later by scientists such as Jean-Baptiste Lamarck
• Evidence for evolution


  • Fossil records
  • DNA analysis
  • Comparative anatomy
  • Embryology
• Microevolution


  Gradual changes within a species over time
• Macroevolution


  Development of new species
• Hominins


  A group of primates that includes humans
• Mechanisms of evolution


  • Natural selection
  • Genetic drift
  • Mutation
  • Gene flow
• Natural selection


  The process by which individuals with advantageous traits are more likely to survive and reproduce, passing their beneficial traits to future generations
• Genetic drift


  A random process that occurs when certain traits become more or less common in a population due to chance events, such as genetic mutations or natural disasters
• Mutation


  A change in DNA that can occur spontaneously or due to exposure to certain environmental factors, such as pollutants or radiation
• Gene flow


  The transfer of genes from one population to another, which can occur through migration or other means
• Evolutionary adaptations


  • Camouflage
  • Advanced cognitive abilities
• Human activities, such as habitat destruction, pollution, and climate change, can have an impact on the evolution of species, sometimes leading to extinction or the development of new adaptations