Biology Vocabulary

3. condition in which an organism maintains a stable internal environment
6. structure composed of two or more types of tissues that work together to do a specific task
9. theory that all organisms consist of one or more cells; that cells are alive and the site of all life processes; and that all cells come from pre-existing cells
10. thin coat of phospholipids that surrounds a cell and controls what enters and leaves the cell
11. rigid layer that surrounds the cell membrane of a plant cell or fungal cell and that supports and protects the cell
12. group of organs that work together to do the same overall job
13. life form, or living thing
15. group of specialized cells of the same kind that perform the same function
16. any structure inside a eukaryotic cell that is enclosed by a membrane and does a special job inside the cell
17. cell in which most of the cell’s DNA is enclosed in a nucleus and which has other membrane-bound organelles

1. production of offspring
2. reaction to a stimulus by a living organism
4. unit of structure and function of all living things
5. something in the environment that causes a reaction in an organism
7. organelle in a eukaryotic cell that contains most of the cell’s DNA
8. cell in which the cell’s DNA is not enclosed within a nucleus and which lacks other membrane-bound organelles
14. organelle in eukaryotic cells that uses energy in glucose to make ATP, which cells can use for energy