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Across 4. cells produced from living things 10. use energy from sunlight to produce food in plants 14. controls what enters and leaves the cell 17. conversion energy from food to energy the cell can use 18. release chemicals that break down large food particles into smaller ones 19. the movement (diffusion) of water molecules through a semi-permeable membrane 20. transport and storage

Down 1. creates lipids or fat 2. protects and supports plant cell 3. where all chimicals take place 5. grain like organelles that produce proteins 6. sends and receives material in cell 7. stores food and other materials needed by the cell 8. are building blocks of proteins 9. controll center of the cell 11. the movement of material through the cell membrane without using the cell's energy (osmosis and diffusion) 12. the movement of material through the cell membrane that requires the cell energy 13. the movement of materials through the cell membrane that requires the cell's energy (engulfing and carrier proteins) 15. the movement of molecules from an area of high concentration ot an area of low concentration (movement of oxygen molecules into the cell) 16. a small dense spherical structure in the nucleus of a cell 21. the basic unit of life in all living things