Across
- 1. the heart of a cell
- 4. exists in all living things
- 7. tiny structure that carries out functions
- 8. protective wall that controls anything coming or going in the cell
Down
- 2. material in a living cell leaving out the nucleus
- 3. an example of photosynthesis
- 5. material that surrounds a cell
- 6. rod-shaped structure produces most of the cells energy