Across
- 3. when an animal or plant has offspring
- 5. events that occur in the animal kingdom
- 7. a group of substances that are essential
- 9. unit of living organisms
- 10. a method of cell division
- 12. particles in the cytoplasm of cells
- 15. unit of composed dna
- 17. organisms in an ecosystem
- 18. appears in nucleus during cell division
- 20. makes up skeleton
Down
- 1. preserved from a long time ago
- 2. a change in chromosomes of a gene or cell
- 4. producing the same phenotype
- 6. protoplasm of cell membrane
- 8. occurs during reproduction
- 11. a mature fertilized plant
- 13. any carnivorous animal
- 14. any agent that can cause disease
- 16. group of complex proteins
- 19. functional unit such as a lung or kidney