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Across 1. An organism that is made up of only one cell is a (BLANK) organism. 5. This type of cell's DNA is contained in the nucleus. 7. Robert Hooke looked at cells of a (BLANK) tree. 11. There are (BLANK) parts to the cell theory. 14. An organism that is made up of many cells is called a (BLANK) organism. 15. This is in the nucleus. 17. The plural form of nucleus. 18. Found in plant cells, this stores water and other materials. 19. Organells that destroy damaged or worn-out organelles. 20. (BLANK) was the first person to see cells. (2 words) 21. Anton Van Leevwenhoek looked at pond scum and saw tiny creatures moving within it. He called them (BLANK).

Down 2. The (BLANK) makes lipids and other materials. (2 words) 3. These hook amino acids together to make proteins. 4. This type of cell's DNA is round. 6. Found in plant cells only, this surrounds the cell and is made of cellulose. (2 words) 8. An organelle that delivers and modifies lipids and proteins. (2 words) 9. Found only in plant cells, the (BLANK) look like tiny stacks of coins. 10. The mitochondria produce this. 12. Bean-shaped organelles that produce ATP are called the (BLANK). 13. Membrane-covered compartments that form when part of the cell membrane pinches off the ER or Golgi Complex. 16. Holds the cell's DNA.