Across
- 4. the distance between successive crests of a wave
- 6. a group of atoms bonded together
- 8. a sweet crystalline substance
- 11. Cycle the cycle of enzyme-catalyzed dark reactions
- 12. the natural agent that stimulates sight
- 14. the process by which green plants and some other organisms use sunlight to synthesize foods
- 17. a colorless gas formed during the combustion of any material containing carbon and an important greenhouse gas
- 18. basic unit of life in organisms
Down
- 1. a simple sugar which is an important energy source in living organisms
- 2. a living organism of the kind exemplified by trees
- 3. molecule found in the cells of all living things
- 5. a plastid that contains chlorophyll
- 7. the supportive tissue of an epithelial organ
- 9. the reaction of something, especially the iris of the eye
- 10. each of a number of flattened sacs inside a chloroplast
- 11. any of a group of red or yellow pigments
- 13. a green pigment
- 15. the chemical formula for water
- 16. the stacks of thylakoids embedded in the stroma of a chloroplast