Across
- 3. — The study of chemicals and reactions in living organisms.
- 5. — The study of relationships between organisms and their environment.
- 7. — The study of living organisms and life processes.
- 8. — The study of cells.
- 12. — The study of bacteria.
- 13. — The study of prehistoric life through fossils.
- 15. — The study of internal structure of organisms.
- 16. — The study of tissues under a microscope.
- 18. — The study of insects.
- 19. — The study of embryo formation and development.
- 20. — The branch of biology that studies animals.
Down
- 1. — The science of naming and classifying organisms.
- 2. — The study of birds.
- 4. — The study of viruses.
- 6. — The study of the form and structure of organisms.
- 9. — The study of heredity and variation.
- 10. — The study of fishes.
- 11. — The study of fungi.
- 14. — The branch of biology that studies plants.
- 17. — The study of functions and activities of organisms.