Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
30 Cards in this Set
- Front
- Back
|
Adaptation |
A change by which an organism or species becomes better suited to its environment |
|
|
Allele frequency |
The number of times an allele appears or occurs in a species |
|
|
Analogous structu |
Evolved separately with no common ancestor, but are very similar in function |
|
|
Artificial selection |
Where nature doesn’t do the selecting// humans interfere |
|
|
Behavioral isolation |
Occurs when members of different populations can no longer be successful |
|
|
Biogeography |
Different characteristics occur in different regions because of different environmental conditions |
|
|
Bottle neck effect |
Sharp reduction in size of population due to environmental issues or human activity |
|
|
Catastrophism |
The theory that certain changes in Earths history where caused by catastrophe rather than gradual evolutionary processes |
|
|
Coevolution |
Two species evolve together competing |
|
|
Convergent evolutions |
Distantly related organisms evolve similar traits |
|
|
Divergent evolution (adaptive radiation) |
Species that where once similar diverge or become different |
|
|
Evolution |
Gradual change over time within groups of species |
|
|
Extinction |
Species dies out |
|
|
Fitness |
The ability to survive to reproductive age |
|
|
Fossils |
Provide records of early life and evolutionary history |
|
|
Founder effect |
When a small group of individuals becomes isolated from a population |
|
|
Gene flow |
The movement and exchange of genes or alleles from one population species to another |
|
|
Gene pool |
The total number of genes of every individual in a population |
|
|
Genetic drift |
The drifting of the frequency of a gene variant relative to that of other gene variants |
|
|
Geographic isolation |
Population of animals or organisms that are separated from exchanging genetic material with other organisms of the same species |
|
|
Gradualism |
A model of evolution in which gradual change over a long period of time leads to biological diversity |
|
|
Homologous structures |
Similar structure found in more than one species that share a common ancestor |
|
|
Microevolution |
Evolving in small scale changes |
|
|
Natural selection |
When an organism with favorable traits survive and reproduce |
|
|
Reproductive isolation |
When different species live in the same area but can’t reproduce together because of a different reason |
|
|
Sexual selection |
Natural selection through preference by one sex for certain characteristics |
|
|
Speciation |
The process in which new genetically distinct species evolves usually as a result of genetic isolation |
|
|
Uniformmitarianism |
The assumption that the same natural laws and processes that operate in the universe have always operated and apply everywhere |
|
|
Variatuon |
A difference |
|
|
Vertical structure |
Various cells tissues and organs in a body which no longer have a process |
