Theory of Evolution
       part 1
Science v.s. Pseudoscience
 Logical process to determine the
 cause(s) of natural events in the
 world.

 observation

 qu...
evolution
not a new idea

life on earth
changes over time

it connects the present with the
past

the unifying theory for ...
Charles Darwin
 1809-1882

 ships naturalist
 on the HMS
 Beagle 1831

 keen powers of
 observation
 and analysis
Darwin’s visit to tropical South America piqued his
interest in the Diversity of Life.
scientist speculate as many as 10 m...
Darwin wondered

          From where does
          this seemingly
          endless variety of
          life come ?

  ...
Jean Baptiste Lamarck
1744-1829

  agreed with the
  fact of evolution

  individual
  strived for
  perfection

  inherit...
Darwin proposed
Descent with Modification
 there were a variety of ways in
 which organisms were designed for
 survival (fo...
“fitness”


 ...the combination of physical traits
 and behaviors that helps organisms
 survive and reproduce in their
 env...
“fitness”
Theory of Natural
Selection

 more offspring are born than can survive

 genetic variation within a population

 competitio...
The Origin of Species by Means of
       Natural Selection

                  Darwin maintained
                  that org...
Darwin argued that just as each new
organism comes from an existing
organism...
...each species has descended from other
species.
                         speciation




  “Early” modern horse types
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Evolution part I

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Part 1 of lecture slides for Mr. Mason's Biology I, Hon. class

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Evolution part I

  1. 1. Theory of Evolution part 1
  2. 2. Science v.s. Pseudoscience Logical process to determine the cause(s) of natural events in the world. observation question constant hypothesis testing
  3. 3. evolution not a new idea life on earth changes over time it connects the present with the past the unifying theory for the study of biology
  4. 4. Charles Darwin 1809-1882 ships naturalist on the HMS Beagle 1831 keen powers of observation and analysis
  5. 5. Darwin’s visit to tropical South America piqued his interest in the Diversity of Life. scientist speculate as many as 10 mi!ion species Darwin also found evidence to speculate that a large number of species were once here but vanished. researches today suspect that of a! the species that onc" lived on earth 99.9% are now extinc$
  6. 6. Darwin wondered From where does this seemingly endless variety of life come ? Why have so many of them disappeared? 'What a life of wonder - every object new'. Tennyson
  7. 7. Jean Baptiste Lamarck 1744-1829 agreed with the fact of evolution individual strived for perfection inheritance of acquired characteristics
  8. 8. Darwin proposed Descent with Modification there were a variety of ways in which organisms were designed for survival (form and behavior) organisms appeared well designed to survive their local environment survival was necessary for reproductive success
  9. 9. “fitness” ...the combination of physical traits and behaviors that helps organisms survive and reproduce in their environment (adaptation)
  10. 10. “fitness”
  11. 11. Theory of Natural Selection more offspring are born than can survive genetic variation within a population competition for resources - “struggle for existence” differential reproduction - the best adapted survive to reproduce
  12. 12. The Origin of Species by Means of Natural Selection Darwin maintained that organisms have been produced through the long, slow process of change in the species over time - Evolution
  13. 13. Darwin argued that just as each new organism comes from an existing organism...
  14. 14. ...each species has descended from other species. speciation “Early” modern horse types

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