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Teri M Decent with Modification

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Teri Mitton

on 14 December 2015

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Transcript of Teri M Decent with Modification

Descent with Modification
Scale of Nature and Natural Theology
Greek philosophers, Plato, and Aristotle
Natural Theology
Carolus Linnaeaus
Cuvier, fossils and catastrophism
Geological gradualism
Hutton and Lyell
Uniformitarianism
Jean Baptiste de Lamarck
Acquired characteristics
organisms can change their body when needed and pass these traits to offspring
Law of use and disuse
If you don’t use a body part it will be lost in the next generation
Charles Darwin
Hired as a naturalist on the S.S. Beagle at age 22.
Wrote down observations and made collections of all living things he saw on his 5 year voyage.
Spent years writing down comparisons of the animals he saw.
After the voyage he wrote several books. (Some on the formation of oceanic islands from coral reefs, geology of S. America and four books on the classification and natural history of barnacles).
Married his cousin at age 29.
He was religious and his wife was deeply religious which slowed down the publication of the book: “Origin of the Species” full title On the Origin of the Species by Means of Natural Selection, or The Preservation of Favored Races in the Struggle for Life
He drafted the book in 1842 but didn’t publish until November 1859.
In 1858 Darwin had received an essay from Alfred Russel Wallace that described the theory of natural selection that he had developed independently
Darwin's Principles
Individuals in a species vary
Some variations are heritable
More individuals are produced than the environment can support
Competition for resources occurs
Individuals with favorable traits (and genotypes) will survive and reproduce. These traits will be passed on to offspring.
Fossils
Comparative Anatomy and Embryology
Bio-geography
Comparative Biochemistry
Fossil Dating
Evidence
Mold Fossils
Cast Fossils
Permineralization - petrification
Replacement Fossils
Organic Matter
Preservation
Homologous Structures
parts w/ same origin not necessarily same function
Analogous Structures
parts w/ different origin but same function
Vestigial Structure
parts w/ no apparent function
Developmental patterns are similar in organisms with similar evolutionary relationships.
Comparison of fetal development
The distribution of species first suggested common descent. Islands have many species of plants and animals that are endemic and that are closely related to species on the nearest mainland.
The sequence of DNA and the proteins that the organism produces
Evidence suggests that organisms with similar DNA and protein are closely related evolutionarily
Relative Dating
Comparisons of age of sediments and the fossils found there.
Absolute Dating
Radioactive Dating
Amino acid raceminzation
Full transcript