Flashcards in lect 1 history of evolutionary thinking Deck (13)
what is the evidence for evo?
-geological history (time scale)
what did peter and rosemary's study include?
their study in the 1970s was on galapagos finches.
-only large seeds persisted
- only large beak birds survived
- increase in beak length in the population
-as normal seeds came back beaks decreased in size
What generally did the greek philosophers observe?
-nature ruled by laws
-body parts theory (primitive selection)
-Expanse of time (fossils in rocks that had been previously under water)
(Greek philosophers) What did Aristotle contribute?
-great chain of being: a graduation in nature. But no change of species
-food chains (interconnectedness)
-survival of the fittest
Linnaeus (Swedish 1707-1778) contribution? and implications there of?
-Classification system (taxonomy)
-idea of change
Leclerc ( French 1707-1788) contributions?
-profound influence on the next generation of french philosophers
-Species exhibit change
-questioned human and ape relatedness
-earth much older than 6000 years
Lamarck (French 1744-1829) contributions?
-evolutionary mechanism of lamarckism
-increasing complexity over time but along same phyletic line
-acquired characteristics inherited by offspring (giraffe necks)
Hilaire (French 1772-1844) contributions?
-unity of composition theory: structural plan basic to all animals
-homology (shared ancestry between a pair of structures)
Cuvier (French 1769-1832) contributions? get anything wrong?
-paleontology: proved extinctions through fossils
-correlation of parts: relationships/ phylogenetics
-catastrophism instead of gradual change
Charles Lyell (British 1797-1875) contributions?
-geologist popularised James Huttons concept of uniformitarianism: constant gradual changes over time
-influenced Darwin: earth millions of years old
Robert Malthus (british 1766-1834) contributions?
-essay on the principles of population: human population increases exponentially whereas, food supply only increases geometrically
-therefore, competition/ survival of the fittest: lots of individuals die: natural selection