Cells!

4. The organelle in cells that stores DNA and helps the cell make proteins
6. The powerhouse of the cell
8. The main food producer for plant cells
9. The double membrane layer that separates the contents of the nucleus from the rest of the cell
10. The jelly-like liquid that fills the inside of a cell
11. The material contained within the nucleus of a cell
12. Tiny molecules in cells that help the cell make proteins
14. Cells without membrane-bound organelles or a nucleus
16. The nucleus and organelles bounded by a thick and rigid cell wall
19. Minute hairlike organelles, identical in structure to flagella, that line the surfaces of certain cells and beat in rhythmic waves
20. An organelle in plant cells used to store food and water
21. Makes ribosomes for the cell

1. The process in cell division by which the nucleus divides
2. Cells with membrane-bound organelles and a nucleus
3. The main protection barrier that surrounds a plant cell
5. An organelle that modifies, packages and sorts proteins sent from the endoplasmic reticulum
7. The basic principle of modern biology
8. A thin biological layer that contains the cytoplasm and all organelles of the cell
13. A cell organelle that makes other substances that the cell needs, such as lipids (fats) and carbohydrates (sugars)
15. The nucleus and organelles bounded by a very flexible membrane
17. The cell's digestive system
18. A cell organelle that contains many ribosomes on its outer surface and makes proteins the cell needs