Across
- 2. part of the earth where organisms ecist
- 4. a life history
- 6. study of humans
- 8. create or invent something
- 9. a segment of dna that is involved in the
- 10. a general kind of something
Down
- 1. pertaining to air life to exist
- 3. chain
- 5. all the people living at the same time
- 7. a coming into being