Bio test 12 Flashcards
Study of where organisms live now and where they and their ancestors lived in the past
Biogeography
Embryology
Similar embryos, diverse adult organisms, originate from common ancestors
The study of ___ provides evidence of evolution
Anatomy
___ structure are similar in structure but different function, evidence of common ancestor
Homologous structure; ex human hands, mole foot, bat wings
___ structure have similar functions but NOT COMMIN ANCESTORS
Analogous; flying wings and bat wings.
___ structure are Remnants of organs structures that had a function in an early ancestor
Vestigial; ostrich wings
Closely related organisms will have similar__
DNA sequences.
Half amount
The amount of time it takes for half the isotope to decay.
Paleontology
Study of fossil or extinct organisms.
fossil can form in several ways.
Permineralized
Natural cast
Trace fossils
Amber preserved
Preserved remains
Index fossils are
Another tool to determine the age of rock layers
What can index fossils provide
Relative age of a rock layer
Life on a changing planet; Physical forces
Climate dramatically changed over time (ice age to volcanic eruptions)
Life on a changing planet; Biological Forces
Photosynthesis organisms releasing oxygen.
; EXTINCTION
Species dies off completely.
Patterns of extinction; background extinction
Slow process, yet steady. Over local span.
Patterns of extinction; Mass extinction.
Relatively short amount of time, Globaly occuring.
Rate of Evolution; Gradualism
Involve a slow steady change in a particular line of descent.
An evolutionary process by which single species or a small group of species evolved over a relatively short time into several different forms
Adaptive Radiation.
Produces similar structures and characteristics in distantly related organisms
Convergent Evolution
Produces different species from same ancestors
Divergent Evolution
Coevolution
Two species evolve at same rate.
Miller Urey Experiment
Added electricity and produced amino acids and organic compounds. Abiotic became biotic.
Endosymbiosis
Is a relationship one organism lives within the body of another
Genetic variation is an___ of sexual reproduction
Advantage
