Unit 1

3. Change through time in a population
6. Tiny structures that carry out functions necessary for the cell to stay alive.
7. Organisms made up of multiple cells
9. A short segment of DNA that contains the instructions for a single trait of an organism
12. Communities of living species and their physical envionments
13. Major subdivisions of all organisms
15. Branch of biology that studies organisms interacting with each other and the environment
16. The maintencance of a stable level of internal conditions even though environmental conditions are constantly changing
17. The sum of all the chemical reactions that take in a nd transform energy and materials from the environment

1. Structures that carry out specialized jobs within an organ system
2. Production of a new organism
4. Division Formation of two new cells from an existing cell
5. Process by which an organism becomes a mature adult
6. The high degree of order within an organishm's internal and external parts and in its interactions with the living world
8. Organisms made up of one cell
10. Groups of cells that have similar abilites and that allow the organ to function
11. System of grouping organisms divides all life into six major categories
14. molecules/ the chemical compounds that provide physical structure and that bring about movement
18. The study of life