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PEOPLE IN EVOLUTION

PEOPLE IN EVOLUTION. Georges Cuvier (1769-1832). First to use comparative anatomy to develop a system of classifying animals. Founded paleontology.

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PEOPLE IN EVOLUTION

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  1. PEOPLE IN EVOLUTION

  2. Georges Cuvier (1769-1832) • First to use comparative anatomy to develop a system of classifying animals. • Founded paleontology. • Developed the theory of catastrophism - says that there had been world-wide catastrophes and after each of these events, God created new sets of species.

  3. Jean-Baptiste de Lamarck(1744-1829) • First to clearly support common descent and to link diversity with adaptation to the environment. • He supported the idea of inheritance of acquired characteristics.

  4. Charles Darwin (1809-1882) • Published the theory of natural selection. • Studied glyptodons - armadillos, patagonian hares - rabbits, tortoises, finches.

  5. Alfred Russel Wallace (1823-1913) • Codeveloped the theory of natural selection with Darwin. • Was a naturalist, like Darwin.

  6. Thomas R. Malthus (1776-1834) • Wrote a book named Essay on the Principle of Population. • Contended that the world’s population increased according to a geometric progression (2, 4, 6) while resources increase in arithmetic fashion (1, 2, 3, 4). • Felt that plagues were representative of divine providence to maintain balance between population and resources.

  7. Stanley Miller • Demonstrated that basic organic compounds, such as amino acids, purines, pyrimidines, sugars, and complete nucleotides, can be synthesized in a chamber of hydrogen, methane, ammonia, and water vapor. • Lightning provided the energy to assemble complex molecules.

  8. Sidney Fox • Produced microspheres which are protenoids (long-chained peptides) surrounded by what resembles a membrane.

  9. A. I. Oparin • Found that he could produce coacervate droplets that had the ability to incorporate simple enzymes within their structures, these were called protobionts or prebionts which are thought to be the forerunners of living cells.

  10. COACERVATE AND MICROSPHERE PROPERTIES • FORM SPONTANEOUSLY IN THE LAB FROM SOLUTIONS OF SIMPLE ORGANIC CHEMICALS. • BOTH ARE PRE-GENETIC STRUCTURES.

  11. PROPERTIES (CONT) • BOTH HAVE A NUMBER OF LIFE-LIKE PROPERTIES (INCLUDING THE ABILITY TO TAKE UP CERTAIN SUBSTANCES FROM THEIR SURROUNDINGS.) COACERVATES CAN GROW, AND MICROSPHERES CAN BUD TO FORM SMALLER MICROSPERES.

  12. PROPERTIES (CONT) • THEY SUGGEST THAT CELLULAR LIFE CAN ARISE WITHOUT DIRECTION FROM GENES. • THEY DO NOT HAVE HEREDITARY PROPERTIES.

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