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1
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|
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2
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- World view before Darwin
- Coming of Evolution
- Decent with modification
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3
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- Life was unchanging
- Eternal, Perfect world we can’t see
- Imperfect world of our senses
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4
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- Organisms don’t change
- Scale of Nature
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5
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6
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- Paleontology
- study of fossils
- Rock strata
- oldest deepest
- Catastrophism
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7
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8
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- Evolution
- Use and Disuse
- Inheritance of acquired characteristics
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9
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- Gradualism
- Uniformitarianism
- Geological change is slow
- Earth must be very old
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10
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- Voyage of the Beagle
- Adaptation
- Decent with modification
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11
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12
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13
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- 1 - Large # of offspring (Overproduction)
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14
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- 2 - Populations remain stable
- 3 – Environmental resources limited
- Inference #1 – Competition – “Struggle for existence” only a fraction of
the offspring survive
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15
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- 4 – Variation in phenotypic characteristics of individuals in the
population
- Inference #2 – Competition – Only those individuals in the population
that have the best “Adaptations” (phenotypes) survive to reproduce.
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16
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- Inference #3 – The unequal ability of individuals to survive and
reproduce will lead to gradual change in a population (Genetic change –
allelic frequencies) with
favorable changes accumulating over generations.
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17
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- Co-developer of the concept of “Natural Selection” as a mechanism for
evolution.
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18
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19
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20
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21
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22
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23
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- Molecular Homologies
DNA structure and resulting protein amino acid sequences of
proteins
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24
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25
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26
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Notes