Across
- 2. a gas produced by respiration and combustion, taken in by plants for photosynthesis
- 4. Specialized cells on the leaf surface that open and close the stomata
- 5. Organic molecule that acts as the main energy carrier in cells
- 7. Molecules that contain BOTH carbon and hydrogen
- 8. Substance that is changed by a chemical reaction
- 9. A pore found in the epidermis of leaves, stems, and other organs, that controls the rate of gas exchange
Down
- 1. The process by which green plants and certain other organisms transform light energy into chemical energy.
- 2. Organelle found in plant and algae cells where the process of photosynthesis occurs
- 3. A gas used in cellular respiration by most organism
- 6. Substance formed by a chemical reaction