Across
- 4. delivery of traits from parent to offspring
- 8. state of steady internal systems
- 9. an organelle in cells who have photosynthesis
- 10. both alleles are expressed
- 11. organism containing a nucleus
- 12. characteristics of an individual
- 13. changes over generations
- 15. a early form from which others evolved
- 16. the smallest unit that can live on its own
- 18. actual genes an organism possesses
- 19. traces of ancient life
Down
- 1. organism that lacks a nucleus
- 2. contains the cells chromosomes
- 3. surroundings where someone lives
- 5. organism physical traits
- 6. part of body functionless
- 7. small cavity or space in tissue
- 9. serves as the cells skeletal system
- 14. the scientific study of genes and heredity
- 17. liquid that fills the cells