Evolution & Natural Selection Flashcards
Evolution Caused by…
Change of allele frequencies of the population
Natural Selection (def)
Organisms born w/ characteristics which help them survive
Geologist; “Earth very old”
George Buffon
Paleontologist; “fossils show waves of extinction”
George Cuvier
Biologist; “species change over time”
Jean Baptiste Lamark
Geologist; “earth changing not static”
Charles Lyell
Earth age pre 19th Century
6000-7000 yrs. old
Darwins Ship
“the Beagle” ; converted warship
x2 Galapagos patterns
- Traits shared within populations/ species
2. Similarity between fossils and living species
Darwin Published;
‘Origin of Species”
Darwin challenged 2 biblical beliefs;
- world is only 6000 yrs. old
2. Species were placed directly by God
x4 Mechanisms of Evolution
- Mutation
- Genetic drift
- Migration
- Natural Selection
Evolution & Natural Selection…
Not the same thing!
Mutations
- Direct change in DNA
- Change in DNA sequence changes Allele
Mutagens
Chemical which induce mutations
