Evolution Flashcards
Natural variation
Due to sex mutations
Fitness
Ability to survive and reproduce
Directional selection
Favors phenotypes and shifts
Stabilizing selection
Favors intermediate phenotypes and tries to stay normal
Disruptive selection
Favors extreme phenotypes and creates more than one group
Geographic isolation
Seperated by physical barrier
Behavioral isolation
Separated by behavior to find mates and reproduce
Mechanical isolation
Not able to reproduce because of different body parts
Temporal isolation
Different times (season, nocturnal)
Homologous structure
Similar structure, different function
Vestigial structure
Leftover
Analogous structure
Different structure, similar function
Radioactive dating
Finding age of fossils through radioactivity (c14)
Relative dating
Finding age of fossils through how deep in ground
Gene pool
Combined genetic info in a population
Gradualism
When a species changes a little though time and those that did not adapt die off
Punctuated equilibrium
Spurts of genetic mutation and change
Convergent evolution
2 organisms become similar
Divergent evolution
Organism forms different species
Coevolution evolution
1 organism evolves with another because of the influence to each other
How the ozone layer was created
Cyano bacteria
Types of reproductive isolation
Prezygotic postzygotic
Artificial selection
Man chooses desirable traits to breed
