Across
- 7. A body part or organ that an organism inherited from an ancestor but no longer has a significant or clear function in the modern species.
- 9. The gradual change in a species over time.
- 10. The job or role of a body part, like how the heart pumps blood or lungs help you breathe.
- 11. A specific characteristic of an individual that can be determined by genes, environmental factors or by a combination of both. These can be qualitative (such as eye color) or quantitative (such as height).
- 12. Body parts that are structurally similar in related species; these provide evidence that the structures were inherited from a common ancestor.
Down
- 1. The process by which individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species.
- 2. An ancient living thing that two or more different species came from.
- 3. The different parts of an organism's body, like its organs, bones, and tissues.
- 4. A characteristic that helps an organism survive in its environment and/or reproduce.
- 5. Any difference between individuals of the same species.
- 6. The physical arrangement of parts within a living thing, from the tiniest cell to a whole organism.
- 8. Differences in the genetic code (DNA) within a species that lead to unique features in each individual (like hair color or eye color).