Across
- 5. a waste product of photosynthesis that organisms need
- 6. particles moving down a concentration gradient
- 7. in a dark room with plenty of air and water, light ____________ is a limiting factor.
- 8. energy is needed to move particles against a ___ gradient
- 10. respiration in the absence of oxygen
Down
- 1. the process by which plants make food
- 2. water molecules move across a semi permeable membrane
- 3. chemical reaction in cells that releases energy
- 4. __________ acid is produced when there is a shortage of oxygen in cells.permeable membrane
- 9. diffusion is a type of _________ transport.