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