Cells

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