| A | B |
|---|
| extinction | organisms no longer exists |
| variation | variety |
| evolution | change occurs over a long period of time |
| speciation | two populations become so different that they are unable to interbreed |
| venom | poison from snakes, spiders |
| pedigree | diagram used to trace a trait through generations in a family |
| natural selection | organisms with favorable traits survive and reproduce at a higher rate than organisms without favorable traits |
| camouflage | "blending in" with its environment |
| mimicry | a resemblance of one organism to another or to natural objects among which it lives |
| mutation | a change in DNA |
