click below
click below
Normal Size Small Size show me how
chapter 4
vocabulary
Term | Definition |
---|---|
species | a group of similar organisims. |
variation | difference between individuals of the same species. |
evolution | the process of modern organisims have descended from ancient organisims. |
fossil | preserved remains or traces of an organisim that has died. |
adaptation | inherited behaivor or characteristic that helps an organisim survive. |
sientific theory | well tested explanationfor a wide range of observations. |
mechanisim | something takes place naturally. |
natural selection | individuals that are more adapted are more likely to survive. |
competition | the struggle among living for things nessesary. |
mutation | any change to the genetic material. |
fitness | how well it can survive. |
sexual selection | acts on the ability possible to get the best mate. |
coevolution | two species evolve in response to changes over time. |
fossil record | fossils we have discovered and learned. |
embryo | young organisim that develops from a fertilized egg. |
homologous structures | similar structures that are inherited from common ancestors. |
extinct | does not exist or will never visit earth again. |
protien | organic material made from carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. |