Cells

3. the process by which cells take in substances from outside of the cell.
4. the process by which organisms use oxygen to break down food molecules to get chemical energy for cell functions.
7. the basic units of structure and function in living things.
9. the stage of the cell cycle during which the cell’s nucleus divides into two new nuclei and one copy of the DNA is distributed into each daughter cell.
10. the form of energy found in all cells.
13. a theory that explains the relationship between cells and living things.
14. a process by which a cell transports secretory products through the cytoplasm to the plasma membrane.
15. a rigid layer of nonliving material that surrounds the cells of plants and some other organism.
16. the movement of materials through a cell membrane without using the cell’s energy.
18. rod-shaped cell structures that convert energy in food molecules to energy the cell can use to carry out its functions.

1. the process in which some organisms use water along with sunlight and carbon dioxide to make their own food.
2. the process by which molecules move from an area of higher concentration to an area of lower concentration.
5. the movement of materials through a cell membrane using energy.
6. the outside cell boundary that controls which substance can enter or leave the cell.
8. a small, round cell structure containing chemicals that break down large food particles into smaller ones.
11. the control center of an animal cell that directs the cell’s activities and contains information that determines the cell’s form and function.
12. a structure in plant cells and some organisms that capture energy from sunlight and uses it to produce food.
13. the jelly-like substance outside of the nucleus that fills each cell.
17. the diffusion of water molecules through a selectively permeable membrane.