Across
- 3. an inherited behavior or physical characteristic that helps an organism survive and reproduce in its environment
- 4. the preserved remains or traces of an organism that lived in the past
- 6. a group of similar organisms that can mate with each other and produce offspring that can mate and reproduce
- 7. change over time; the process by which modern organisms have descended from ancient organisms
Down
- 1. pattern of evolution characterized by the slow and steady accumulation of small genetic changes over long periods of time
- 2. a well- tested explanation for a wide range of observations or experimental result
- 5. any difference between individuals of the same species