click below
click below
Normal Size Small Size show me how
PCS Liv Env
Vocabulary for Topic 5 - Evolution
Term | Definition |
---|---|
Adaptive Value | any trait that helps an organism survive and reproduce under a given set of environmental conditions |
Evolution | the process by which species have changed over time |
Extinction | the disappearance of all members of a species from Earth |
Fossil Record | a collection of fossils used to represent Earth's history |
Genetic Variation | the normal differences found among offspring |
Geologic Time | Earth's history as revealed by layers of rocks |
Mutation | any alteration in the sequence of DNA |
Natural Selection | the process by which the organisms that are best adapted to a specific environment survive and produce more offspring than organisms that are not as well adapted |
Overproduction | the potential for a species to increase its numbers beyond the area's carrying capacity |
Theory | an explanation, supported by many observations and/or experiments, that can be used to accurately explain related occurrences |