Evolution Flashcards
What is Antiquity
The most common idea was that the earth was immutable (meaning it could and did not change)
Early Church?
Early church fathers - interpreted story of genesis allegory (story not history)
Islamic Philosophy?
Explores how organisms interact with each other in an environment - relationships between organisms
Ibn Khaldun?
- “Humans developed from the world of monkeys”
- Theorized a process that allowed species to “become more numerous”
Comte Georges-Louis Leclerc de Buffon
- Noted that some parts serve no purpose - suggests that species had been created in a “perfect” form” but had changed or derived from it over time.
- Compared parts and anatomy of animals
- Degraded from “perfect form”
Linnaeus and Erasmus Darwin
- Both suggested that life had changed over time.
- Fossil discovery provided idea that some species had gone extinct
- Erasmus suggested life might have evolved from a single original source (common ancestor)
- Neither could provide a mechanism by how life had changed and evolved. - ideas remained speculative - no mechanism
Jean-Baptiste LaMarck
-His ideas are NOT correct
- Acquired characteristics CANNOT be passed on, can’t choose the traits that get passed on
- However it was a start of an explanation
- All species evolve over time
- Species evolves in response to its environment - becomes better adapted
- Changes are passed from generation to generation
What are fossils
- Preserved remains and traces of past life
- Bones turn into minerals
George Cuvier
- Found simple organisms were found in all depths of rocks
- More complex are only found in shallow depths
- Shallower depths are more likely to resemble living species
- Rock layers contain fossils of many species that do not occur in layers above or below them
Catastrophism?
- Cuvier’s response was that the Earth had undergone a series of catastrophes, catastrophes that wiped out past species
- The pattern of fossils could be accounted for by a series of global catastrophes that wiped out most species on Earth
Uniformitarianism?
- Charles Lyell described uniformitarianism as the very slow, gradual process/method by which the Earth had changed
- Geological processes, laying down sediment, occurs extremely slowly
In order for layers of rock to develop it would take many many years. - Geological changes are slow and gradual and that natural laws and processes have not changed over time
Artificial Selection
- Human Influence path of different organisms
- Process where humans choose desirable traits in plants or animals
- Selective breeding - Enhance characteristics
- Occurs over many gens