biology

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Across
  1. 2. A large vacuole that rests at the center of most plant cells and is filled with a solution that contains a high concentration of solutes.
  2. 5. A rigid structure on the outside of certain cells, usually plant and bacteria cells.
  3. 6. The region of a cell that contains the cell's main DNA. Centre of a cell.
  4. 8. shorter term for spermatozoon; male gamete
  5. 9. DNA coiled around and supported by proteins, found in the nucleus of the cell.
  6. 11. The removal of soluble waste materials.
  7. 12. Powerhouse of the cell
  8. 13. Hairlike projections that extend from the plasma membrane and are used for locomotion.
  9. 15. Small part of all living things.
  10. 16. The tendency of a solvent to travel across a semipermeable membrane into areas of higher solute concentration.
  11. 19. The breakdown of food molecules with a release of energy.
  12. 20. Conversion of light energy from the sun into chemical energy.products of photosynthesis are glucose and oxygen
Down
  1. 1. A thin covering of tissue.
  2. 3. An organelle containing chlorophyll for photosynthesis.
  3. 4. A membrane that allows some molecules to pass through but does not allow other molecules to pass through.
  4. 7. A pigment necessary for photosynthesis.
  5. 10. main source of energy
  6. 14. The breakdown of absorbed substances.
  7. 16. Made of thousands of cells, connected by several body systems to do work to keep our bodies healthy & alive.
  8. 17. A membrane-bounded "sac" within a cell.
  9. 18. Sets of organs in our bodies that do the work to keep us healthy and alive.