Across
- 1. fossil a fossil that has been dated
- 5. structure similar structures that came from a common ancestor
- 6. shows the structure of organisms that lived long ago
- 7. Genes that control how bodies are structured
Down
- 2. is an early stage of animal development, before the fetus
- 3. anatomy comparing body parts; like bones to see if they have a common ancestor
- 4. structure A structure that has no purpose