Evidence of Evolution (notes) Flashcards
- species are immutable
- John Ray (1686) “one species never springs from the seed of another”
theory of special creation
“one species never springs from the seed of another”
John Ray (1686)
- species are not immutable, can change over time
- lineages split and diverge (speciation)
- microevolution
- macroevolution
theory of evolution: descent with modification
species can change over time
not immutable
lineages split and diverge
speciation
refers to small changes over short periods of time within a population
Microevolution
- refers to larger changes over a much longer time scale
- can result in speciation or the emergence of new species.
Macroevolution
Evidence of microevolution
- selective breeding
- direct obervation of natural populations
- vestigial structures
- involves choosing parents with particular characteristics to breed together and produce offspring with more desirable characteristics.
- artificial selection
Selective breeding
Structures that have no apparent function and appear to be residual parts from a past ancestor
vestigial structures
Evidence of speciation
zoonosis
infectious disease that is transmitted between species from animals to humans (or from humans to animals
zoonosis
Evidence of macroevolution
- fossil records
- transitional fossils
prove existence of life before
fossil records
any fossilized remains of a life form that exhibits traits common to both an ancestral group and its derived descendant group
transitional fossil
