Across
- 2. gradually change over time
- 3. the study of the distribution of plants, animals, and other types of life
- 7. the fact or process where a species is no longer existing
- 8. a structure that was once functional in an organism's ancestors but has lost its primary function over time through evolution
- 9. the condition of being physically fit and healthy.
- 10. a group of organisms that can naturally interbreed and produce fertile offspring
Down
- 1. where one extreme trait becomes more common in a population because it's better suited for the environment
- 4. become adjusted to new conditions.
- 5. a permanent change in the DNA sequence of a cell
- 6. all the individuals of a particular species living in a specific area
- 8. a change or difference in condition, amount, or level, typically with certain limits.