Evidence of evolution
It is the study of similarities and differences in structures of different species.
What is comparative Anatomy?
A kind of evolution that occurs in short geologic time.
What is micro evolution?
New species are evolving.
What is speciation?
1. Organisms change over time
2. Living things with beneficial traits produce more offspring (natural selection)
What is Darwin's theory?
The change of a structure of a gene.
What is mutation?
Peter and Rosemary grant.
Who were eyewitnesses of Evolution?
Number of specific species in an area.
What is a population?
A major evolutionary change.
What is macro evolution?
HMS Beagle
What was the Ship called that Darwin was on?
-Mutation
-Gene flow
-Genetic drift
-Natural selection
What are forces of evolution?
It is the study of similarities and differences in embryos of different species.
What is comparative Embryology?
All the genes of all the members of a population.
What is a gene pool?
The geographic separation which doesn't allow species to interbreed.
What is Allopatric Speciation?
1. Diversity of life (tropical)
2. Continents and oceans change dramatically over time
3. Slow, steady processes also change the earth's surface over time
4. Fossils show changes in animals
What were 2 of Darwin's observations?
It keeps genes in a narrow window.
What is Stabilizing selection?
There is multiple times of an animal today but they all came from a common ancestor.
An animal started at one point and migrated and changed into new environment.
What is the study of Bio geography?
How many of each Allele are found in a population.
What are Allele frequencies?
New species without geographic separation.
What is Sympatric Speciation?
Artificial selection is that humans can breed plants and animals to have useful traits, so it doesn't happen naturally.
What is artificial selection?
Two extreme Phenotypes are selected.
What is Directional selection?
-Studied Darwin's finches on the Galapagos islands.
-Drought caused fewer seeds.
-Smaller beaks --> Only small seeds so they died in the drought.
-Population: Beaks increase in size in just 2 years.
What did they do/witness?
Dont change if:
-no mutation
-no migration
-very large population
-mating is random
-no natural selection
What are 3 things Hardy Weinberg said about the changing of populations?
Species in Symbiotic relationships tend to evolve together.
What is Coevolution?
Jean Baptist, Charles Lyell and Thomas Mathus
Who were the three people that had the main influence on Darwin?
Phenotypes in the middle of the range are selected against sexual dimorphism.
What is disruptive selection?