Solved by a verified expert:1. What does a stoma do? Where do you find them?2. What type of cells guard a stoma?3.How do they change shape to open and close the stoma?4. What does the air space do?5. What are some simple differences between the spongy mesophyll and palisade mesophyll cells?6. What type of plant tissue undergoes photosynthesis?7. What is the role of epidermal cells in a plant?8. How do pH indicator dyes work?