Sources Of Evdience For Evolution Flashcards
What are 5 types of evidence of evolution?
1) Fossils
2) Biogeography
3) Anatomy
4) Embryology
5) DNA
What is biogeography
The study of the past and present geographical distribution of species populations
What is an example of biogeography
Camels
What is a homologous feature?
structures that share a common origin but may serve different functions in modern species
similar structure but different functions
What is an analogous feature?
structures that are similar in function but not in origin or anatomical structure.
What is an example of an analogous feature?
Bird and butterfly - wings
What is a vestigial feature?
rudimentary and non-functioning structures that are homologous to fully functioning structures in closely related species.
Give an example of a vestigial feature
Pelvic bones in a whale or appendix in a human
How does dna serve as evidence of natural selection?
The more similar the DNA is, the more closely related.
Similar DNA infers a more recent common ancestor.
How do fossils form?
- Organism dies
- Buried and compressed under several
Layers of sediment - High pressure fossil mineralizes
- Erosion or excavation exposes the fossil
Explain how fossils have helped to create a timeline of the natural history of earth.
determined by placement in fossil bed
If a fossil is closer to the surface, it is “younger”
Give an example of a transitional
Fossil
Archeopteryx- evidence of dinosaur and bird- claws sharp teeth and feathers
