Across
- 3. A reaction to stimulus
- 5. A living thing that lives in an organized way
- 8. Something that causes a reaction
Down
- 1. Regulation of internal conditions
- 2. The process of natural changes
- 3. Producing off springs
- 4. Something that has all the characteristics of life
- 6. The addition of mass of cells to an organism
- 7. The study of life
- 8. A group of organisms that can breed