Download - Evolution presentation
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Julian Gomez,Jessica Ceballos,Edward
Reyes,Maria RinconChapter 16 Darwin's Theory
of EvolutionSection II.Period 4
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II. Idea's That Shaped Darwin's Thinking
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A. An Ancient, Changing Earth
● 1875 Hutton presents hypothesis● on how geological process have shaped
Earth
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1. Hutton and Geological Change
● Geological process and geological features,like mountains,valleys,and layers of rocks that look folded
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2. Lyell’s Principles of Geology
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B. Lamarck’s Evolutionary Hypothesis
● Acquired characteristics● species become better over time
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1. How Did Lamarck Propose That Species Evolve?
● species characteristics change over time ● change over time using/not using body
parts
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2. Lamarck’s Idea
● Acquired characteristics● adapt by using body in new ways
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3. Evaluating Lamarck’s Hypotheses
● traits are passed down (inherited)● evolution doesn't mean over time species
become better
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C. Population Growth
● Thomas Malthus notes birth rates are surpassing the rate of death in pop.
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What was Malthus' View of Population Growth?
● 1798, Malthus thinks human pop. growing unchecked will result in scarce resources.
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D. Artificial Selection
● artificial selection is selective breeding of plants and animals
●
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1.How is Inherited Variation used in Artificial Selection?
● farmers would breed trees that produced the largest fruit or cows that had more milk
● Darwin tested artificial selection by raising and breeding pigeons