Across
- 2. the protective wall of a cell
- 3. a fluid outside the nucleus but inside the cell wall
- 5. the brain of a cell
- 7. a building block of life
- 8. a group of cells surrounded by an outer shell
- 9. a special tool for observing tiny objects like cells
Down
- 1. consisting of one cell
- 3. a part of a plant cell that makes photosynthesis possible
- 4. consisting of many cells
- 6. a cell, especially one taken from a person or animal in a very early stage of development, that can develop into any other type of cell