Calendar
Contact Teacher
Labs:
   nothing
   nothing
   nothing
Links

Notes:
   Animal Body
   Arthropods
   Biochem
   Cell Cycle
   Cell Interactions
   Cell Structure
   Circulation Respiration
   Communities
   Digestion
   DNA
   Ecosystems
   Energy
   Evolution Evidence
   Future of Biosphere
   Genetic Engineering
   Gene Function
   Genetics
   Hormones
   Human Evolution
   Immunity
   Species Interaction
   Kidneys
   Locomotion
   Membranes
   Mollusks
   Mutation
   Nervous
   Non-Coelmic
   Photosynthesis
   Plant Physiology
   Population Genetics
   Population Dynamics
   Cellular Respiration
   Sensory
   Speciation
   Taxonomy
   Vertebrates
   Vertebrate Org
Vocabulary:
   1,2,3,4,5,6,7,8,9,10,
   11,12,13,14,15,
   16,17,18,19,20,
   21,22,23,24,25,
   26,27,28,29,30,
   31,32,33,34,35,
   36,37,38,39,40,
   41,42,43,44,45,
   46,47,48,49,50,
   51,52,53,54

Evidence for Evolution

I. Evidence for Microevolution

   A. Sickle Cell Anemia
      1. Valine substituted for glutamine
      2. R.B.   C. <~Conformational Change

      3. Frequency
         a) Af-Amer - .045
         b) Wht-Amer - .001
      4. Type 1 – heterozygous- 2% change of hemoglobin
      5. Type 2 – homozygous rec – fatal
      6. Heterozygous case is more fit reproductively (less susceptible)
      7. Selection is acting to eliminate homo rec.

   B. Peppered Moth / Industrial Melanism
      1. Dark colored organisms are favored over light colored
      2. Hidden dominant – England
      3. Trees used to be light colored; white moths survived
      4. Trees became dark colored; black moths survived

   C. Lead Tolerance
      1. Plants grew near mines
      2. Plants grew in pastures
      3. Plants from mine grew in pasture
      4. Plants from pasture didn’t grow in mine
      5. They were ancestors
II. Evidence for Macroevolution

   A. Fossil Record
      1. Older fossils are on bottom layers
      2. C14 dating; Ratio of radioactive materials remaining
      3. Horses – 4 toes to 1
      4. Hoofed mammals ~> small nose bump ~> horn (Rhino)

   B. Molecular Record
      1. Accumulation of genetic changes in DNA
      2. Farther apart evolutionarily; the more changes
      3. Phylogenetic Tree  ~> Evolutionary History (Hemoglobin)
      4. Whale / dolphin / propose

   C. Homology
      1. Common ancestor form
      2. Similar structures but different functions

   D. Developmental
      1. We go through stages of development, which are similar to our ancestors
      2. Slugs ~> mollusks <~ Giant Ocean Squid
      3. Humans ~> gill slits, tail, webbing, fur

   E. Vestigial structures
      1. Pelvis in whale
      2. Ear muscles in human
      3. Appendix

   F. Convergent Evolution
      1. Same structures / adaptations in organisms in totally different areas

   G. Tempo (Rate of Evolution)
      1. Gradualism – evolution occurs at a very steady slow pace
      2. Punctuated Equilibrium – long periods of slow gradual change punctuated by short periods of rapid growth
      3. Separation = evolution

Back To Top

Layout by J.T. Poirier © 2001