Evidence for Evolution. Evolution Evidence for Evolution 1.Fossil evidence –petrified or preserved specimen in things like: ice, amber, sand, clay some.

Evidence for Evolution

EvolutionEvidence for Evolution

1.Fossil evidence

–petrified or preserved specimen in things like: ice, amber, sand, clay

•some are extinct

•remains of the

hard parts of organisms

EvolutionEvidence for Evolution

Fossil evidence

•relative dating

–older fossils are found

in the lower layers of

rock while younger

fossils are found in

upper layers of rock

–can be used to figure

out when organisms

lived

EvolutionEvidence for Evolution

Fossil evidence

•radiometric dating

–uses the rate of decaying radioactive isotopes to determine age of fossils

–carbon dating

•looks at the amount of C14 to amount of C12 in a fossil

EvolutionEvidence for Evolution

2.Genetics

•DNA/RNA

•mutations

•gene pool

–entire collection of genes

in a population

EvolutionEvidence for Evolution

3.Comparative Embryology

•embryology- similarities among the young embryos suggest evolution from a common ancestor

EvolutionEvidence for Evolution

4.Comparative Biochemistry

•looking for similarities and differences in specific macromolecules

–antibodies

–hemoglobins

EvolutionEvidence for Evolution5.Anatomy•homologous structures

–structural features with a common origin •analogous structures

–body parts of organisms that do not have a common evolutionary origin but have similar functions

•vestigial structure–a body structure that has no function in a present-day organism but was once “useful” to an ancestor

EvolutionEvidence for Evolution

5.Anatomy

•homologous structures

EvolutionEvidence for Evolution

5.Anatomy

•vestigial structure

EvolutionEvidence for EvolutionMore examples•mimicry: structural adaptation that enables one species to resemble another

•camouflage: adaptation that allows a species to blend into their surroundings

•antibiotic resistance

EvolutionEvidence for EvolutionMore examples

EvolutionEvidence for EvolutionMore examples

EvolutionEvidence for EvolutionMore examples

Barreleye fish Macropinna microstoma