| Term | Definition |
|---|
| organic evolution | change in organisms over time |
| lamark | organisms evolve from pre-existing organism |
| use and disuse | if an organ is used it becomes stronger and more developed. If unused it deteriorates and disappears |
| inheritance of acquired characteristics | acquired features (features not born with) can't be passed on to offspring |
| overproduction | organisms generate more offspring than can possibly survive |
| competition | b/c this abundance of organisms needs all the same resources and theres not enough for everyone, competition arises. The loser dies out |
| variations | no 2 individuals are 100% the same, there are differences |
| adaptations | a variation that gives a winning edge to an organism |
| randomness | the appearance of adaptations is totally random |
| natural selection | the environment determines what variations will be adaptations |
| survival of the fittest | organisms that best fit into their environment survive better b/c of adaptations |
| species | group of organisms so closely related that they can have offspring amongst themselves |
| speciation | evolution of a new species from an older one |
| sexual selection | in the environment are members of the opposite sex, certain variations can be favored by the opposite sex |
| allopatric speciation | physical/geographical barrier breaks up a single population of a species into 2 or more populations |
| sympatric speciation | group of species is not physically separated |
| adaptive radiation | branching out into different species from one species in same location |
| fossils | remains of once living organisms |
| comparative anatomy | look at fossils and native similar features in the fossil to living forms |
| analogous structures | structures with similar functions but different composition/arrangement of organs |
| convergent evolution | when 2 species evolve similar adaptations but are not related |
| homologous structures | organs that may have different functions but are arranged in the same way |
Combine with other sets
Share on Facebook
Share on MySpace