Earth Forms and Life Begins
What is Darwin's theory?
The theory of evolution; orginims change over time
What does a Paleontologist do?
Study fossils
Who were the eyewitnesses to evolution?
Peter and Rosemary Grant
What is macroevolution?
Over geologic time, results from microevolution over many generations
What are fossils?
Preserved remains or traces of organisms that lived in the past
What is the HMS Beagle?
What is comparative anatomy?
Who studied Darwin's finches on Galapogos Islands?
What is microevolution?
Short period of time
What makes up a good fossil?
Quick burial, hard parts like teeth or bones, and traces such as footprints
What were Charles' first observations?
Diversity of life ( tropical rainforests with many species)
What is a homologous structure?
Similar structures are inherited from a common ancestor
On the Galapagos Islands, what caused the decline in seeds?
Drought
Define population
Numbers of species in a given area
What is absolute dating?
Raidometic materials to find a date for the rock
Who was an influence on Charles Darwin?
Jean Baptiste
What is an analogical structure?
Structures that are similar in unrelated organisms
What are the forces of evolution?
Mutation, gene flow, genetic drift, and natural selection
What is a gene pool?
All genes of all the members of a population
What is relative dating?
The position of rocks
What did Wallence (same theory as Darwin) push Charles to do?
Pushed Darwin to finish his book
Do we need the vestigial structures?
No
What is directional selection?
Two extreme phenotypes are selected for; Grant's observation of the finches
What is Hardy-Weinberg's theory?
Alleles in a population don't change if, no mutations, no migration, a very large population, mating is random, and no natural selection