ch 2.1 review

2. a widely accepted explanation of the relationship between cells and living things
5. a sac like organelle that stores food, water, and other materials
7. observed living cells
8. concluded that all plants are made of cells
11. a property of cell membranes that allow some substances to pass across it while others cannot
15. the ability to distinguish 2 nearly objects
16. stated that all cells come from other cells
18. the thick fluid region of a cell located in the cell membrane (in prokaryotes) or between the membrane and nucleus (eukaryotes)
19. concluded that all animals were made of cells
20. a thin flexible barrier that surrounds a cell and controls which substances pass in and out

1. observed dead cells
3. a large oval organelle in a cell that contains its genetic material in the form of dna
4. the process by which molecules move from an area of high concentration to lower concentration
6. a tiny cell structure that carries out a specific function within the cell
9. the basic unit of structure and function in living things
10. rod shaped organelles that convert energy in food molecules to energy
12. an organelle in plant cells and some other organisms that capture energy from sunlight
13. the instrument that makes small objects look larger
14. a rigid supporting layer that surrounds the cells of plants and some other organisms
17. an object appearing larger than is