biology

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Across
  1. 3. are cells that don't enclose DNA in nuclei
  2. 4. membrane a thin flexible barrier that all cells have
  3. 5. membrane-enclosed structure
  4. 8. wall wall a strong supporting layer around the membrane
  5. 9. convert the chemical energy stored in food molecules
  6. 10. large genetic-enclosed structure contains gentic material formed in DNA
  7. 13. permeable that some substance can pass across them and others cant
  8. 15. bilayer gives the cell membrane a flexible structure that forms a strong barrier between the cell and its surroundings
  9. 16. little organs
Down
  1. 1. are cells that are enclosed in their DNA in the nuclei
  2. 2. protein filaments
  3. 4. portion of the cell outside the nucleus
  4. 6. capture the energy from sunlight and convert it into chemical energy stored in food during photosynthesis
  5. 7. are small particles of RNA and protein found throughout the cytoplasm in both types of cells
  6. 11. the basic unit of life
  7. 12. theory a fundamental concept of biology
  8. 14. reticulum eukaryotic cells contain an internal membrane system
  9. 17. apparatus is a stack of flattened membranes