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