Evolution Flashcards
What did Hutton and Lyell conclude?
That the processes that changed earth and the same ones that exist today (geology)
Lamarack’s hypothesizes
Suggested that organisims could change during their life by adding specific traits and that these traits would be passed to their offspring; false
Darwin’s observations on his voyage:
The closer geographically organisims lived, the more similartheir ancestors were
- Varied globally
- Varied locally
- Varied over time
Natural Selection
Because of limited space and resources, species must compete to live
Some organisims were better suited for certain environments
Individuals suited to environmets survive and reproduce
Other organisims die out
Artificial Selection
Nature provides the variations, humans select those they find useful
Variations favor humans
Breeding certain favorable types of animals to get the best offspring
Evolution
Darwin developed this scientific theory, modern organisims evolved over long periods of time through descent from common ancestors
Examples of Evidence for Evolution
- Biogeography: Animals closer together in geography are closly related
- Fossils: Evidence of a certain organism has changed throughout time
- Comparitive Anatomy: Compare physical structures, homologous
- Compartive Embroyology: Compare early development to other organisms
5. Molecular Biology: Genetics, comparing two species’s DNA, recent common ancestor if they are similar
Homologous and Analogous Structures
- Homologous= same structures because of same ancestors (monkeys and humans)
- Analogous= same structures but because of coincedence (fly and bird wings)
Adaptive Evolution
Creates homologous structures
Convergent Evolution
Creates analogous structures
Gene Pools
all of the genes or alleles in a population
