Origin of Life

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Origin of Life
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• I. Biogenesis
• A. Life comes from life.
• B. Spontaneous Generation life comes from no
  life.
• II. Proof of Biogenesis
• A. Redis Experiment
• C. Spallanzanis Experiment
• 1. Endospores
• B. Pasteurs Experiment
• 1. Swan neck flask

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Review

• What does spontaneous generation mean?
• Explain the term vital force and its role in
  spontaneous generation.
• Explain how Redis experiment disproved
  spontaneous generation in flies?

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• III. Earths History
• A. Formation of the Earth
• 1. Age 4.6 Billion years old
• 2. Radioactive dating
• a. Half life
• b. Isotopes
• B. First inorganic organic compounds
• a. Ammonia, Hydrogen, nitrogen, Water vapor,
  methane, carbon dioxide, carbon monoxide
• b. Amino acids, Carbohydrates, nucelic
  acids.
• c. Miller experiment

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• C. Molecules to cell like structures
• 1. Microspheres
• spherical structures that contain many
  proteins.
• 2. Coacervates
• collection of droplets that are composed of
  molecules (ammnio acids, sugars.

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• IV. First Life Forms
• A. Origin of heredity
• 1. RNA
• a. enzyme
• b. Storage of genetic information
• 2. First Prokaryotes
• a. Chemosynthesis
• b. Photosynthesis
• c. Aerobic respiration
• 3. First Eukaryotes
• a. Endosymbiotic theory

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Evolution

• Evidence
• A. Fossils
• B. Strata layers of the Earth, suggesting a
  sequence of time when living things possibility
  existed.

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• Law of superposition.
• 1. Relative Age
• 2. Absolute Age
• C. Extinction

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• II. Theories of Evolution
• A. Lamarcks
• 1. Similar species descended from a common
  ancestor.
• a. Acquired Traits not from genes but
  from a lifetime of experiences behavior.
• .

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• B. Darwin
• 1. 1831 Voyage of the HMS Beagle
• a. To map the coast line of S.
  America.
• b. Ships Naturalist
• c. Galapagos
• d. Publication Origin of the Species

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Who was Darwin?
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Observations from Galapagos
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Galapagos Islands
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• III. Darwins Theory
• A. Descent with Modification
• B. Modification by Natural Selection
• 1. Adapt
• 2. Fitness
• 3. Adaptive Advantage

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• IV. Processes of Evolution
• A. Evidence
• 1. Homologous Structures similar features
  that share in a common origin.

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• 2. Analogous Structures Similar function but
  different origin

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• 3. Vestigial Organs useless features
• ex. Humans tailbone
• Human appendix
• Whales pelvic bones

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• 4. Similar Embryology
• 5. Similar Macromolulces

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• V. Patterns of Evolution
• A. Coevolution change of two of more species
  in close association with one another.

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• B. Convergent becoming more similar
• ex. Shark fish

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• C. Diveregent Evolution becoming more
  dissimilar
• ex. Dogs
• Darwins Finches
• 1. Adaptive radiation

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• 2. Artificial Selection humans pick
  particular traits