Across
- 3. a plastid that contains chlorophyll
- 4. the material of which the chromosomes of organisms other than bacteria are composed
- 9. The energy obtained from the sun
- 10. the changing of the structure of a gene, resulting in a variant form
- 12. the chemical breakdown of a substance by bacteria, yeasts, or other microorganisms
- 13. scientific study of life
- 14. study of heredity
- 15. basic building block of living things
Down
- 1. scientific study of plants
- 2. membrane-bound organelle that contains the cell's chromosomes.
- 3. a threadlike structure that carries all genetic information
- 5. production of energy in organisms
- 6. the source of energy for use and storage at the cellular level
- 7. all living things evolve from growth
- 8. the scientific study of animals
- 11. Living things maintain a relatively stable internal environment.
- 13. unicellular organisms that cause disease