Across
- 3. a chemical that turns leaves green.
- 5. A group of tissues that work together to perform a specific function.
- 6. one-celled organism that is made of a single cell that carries out its life processes.
- 8. Similar cells that work together at the same job.
Down
- 1. many-celled organism that is made of more than one cell.
- 2. a living thing.
- 4. Organs that work together to perform a certain function.
- 7. the smallest unit of living things that can carry out the basic processes of life.