| A | B |
|---|
| a characteristic that helps an organism to survive in its environment | adaptation |
| this contains chemical instructions for inherited traits | gene |
| is an individual who has inherited a gene or trait but does not show it | carrier |
| the passing down of inherited traits from one generation to another | heredity |
| the age of one rock or fossil as compared to another | relative age |
| a way of acting or behaving that you are born with | instinct |
| plant stems that lie on or under the ground and sprout new plants | runners |
| organisms that are best suited for their environments survive and reproduce successfully | natural selection |
| the remains, traces, or imprints of living things | fossils |
