Across
- 3. A reaction to a stimulant
- 6. the science of life.
- 7. The process of natural changes.
Down
- 1. A body of knowledge based on the study of nature.
- 2. Any inherited characteristic that results from changes to a species over time.
- 4. A group of organisms that can breed with one another.
- 5. Regulation of an organism's internal conditions to maintain life.
- 8. An explanation of natural phenomenon supported by many observations and experiments.