Across
- 4. a chemical found in plants causing them to be green
- 5. organs that work together to perform a certain function
- 7. a group of tissues that work together to perform a specific function
- 9. one-celled organism
Down
- 1. many-celled organism
- 2. a group of similar organisms in a genus that can reproduce more of their own kind
- 3. the food-making process in green plants that uses sunlight
- 6. any living thing that can carry out its life on its own
- 8. the smallest unit of living things