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Evolution by Natural Selection - General Biology

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Termini in questo insieme (20)

  • Typological Thinking (Plato & Aristotle)
    Typological thinking assumes species are specially created, variation is unimportant, and species do not change over time.
  • Uniformitarianism (Charles Lyell)
    Uniformitarianism is the idea that geological processes are slow, steady, and ongoing, implying the Earth is very old.
  • Lamarck's Theory of Evolution
    Lamarck proposed that species adapt to their environment and pass on acquired characteristics to offspring, which is now known to be incorrect.
  • Population Thinking (Thomas Malthus)
    Populations tend to increase, leading to competition for limited resources among individuals.
  • Darwin's Four Postulates
    1. Variation exists in populations. 2. Some traits are heritable. 3. Survival and reproduction vary. 4. Individuals with advantageous traits survive and reproduce more.
  • Natural Selection
    Natural selection is the process where individuals with heritable traits that increase survival and reproduction become more common in a population.
  • Descent with Modification
    The pattern of evolution where populations change over time, leading to species related by common ancestry.
  • Evidence for Evolution
    Includes fossil records, species relatedness, and observed natural selection in populations.
  • Role of the HMS Beagle Voyage
    Darwin collected specimens and made observations that helped him formulate his theory of evolution by natural selection.
  • Pocket Mice Coat Color Variation
    Pocket mice in different habitats have coat colors matching their environment, aiding survival by camouflage.
  • Heritability of Coat Color in Pocket Mice
    Coat color differences are controlled by specific genes and mutations; black fur is dominant to tan.
  • Survival and Reproductive Success in Pocket Mice
    Many mice are eaten by predators; those with coat colors matching their habitat survive and reproduce better.
  • Experimental Approach to Study Natural Selection in Mice
    Observe mice populations in different habitats and analyze genetic differences related to coat color.
  • Genotype to Phenotype Connection
    Differences in DNA sequences lead to differences in proteins, which cause observable traits like coat color.
  • Scientific vs Religious Questions
    Science asks questions answerable by evidence, such as fossil age; religion addresses social or philosophical questions.
  • Importance of Variation in Evolution
    Variation among individuals is essential for natural selection to act upon.
  • Heritability in Evolution
    Traits must be heritable for natural selection to cause evolutionary change.
  • Competition in Populations
    Limited resources cause individuals to compete, influencing survival and reproduction.
  • Adaptation
    A trait that increases an individual's fitness in a particular environment.
  • Role of Mutation in Evolution
    Mutations create genetic variation that can lead to new traits subject to natural selection.