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Across 5. a difference of concentration in two areas next to each other 6. for making roots; deficient in this - the plant will have purple leaves and small roots 8. limiting factor to boost speed of photosynthesis; the sun 10. in a plant cell - filled with cell sap to help keep the cell turgid 12. in a plant cell - contain chlorophyll, which absorbs light energy for photosynthesis 17. for making chlorophyll; deficient in this - the plant's leaves will turn yellow 18. in a plant cell - strengthens the cell 19. protein synthesis happens here 20. the movement of particles from high to low

Down 1. limiting factor of photosynthesis; gas in the air 2. a type of carbohydrate made from glucose by plants 3. chemical change which happens in the leaves of green plants to make food 4. most energy is released by respiration here 7. for making amino acids, which are needed to make proteins; deficient in this - the plant will suffer from stunted growth 9. limiting factor of photosynthesis; warmth 11. controls the movement of substances into and out of the cell 13. for making flowers and fruit; deficient in this - the plant will have poor flower and fruit growth and leaves will have dead spots 14. most chemical processes take place here, controlled by enzymes 15. contains genetic material, which controls the activities of the cell 16. the movement of water particles