Across
- 6. What do you compete in?
- 8. How did life originate?
- 9. What is a group of living organisms called?
- 10. What is transferred from a parent to an offspring?
- 11. What are the cells called that link up to either an animal or another human?
Down
- 1. What is the thread-like structure of nucleic acids called?
- 2. There are different ___________ of species.
- 3. What is it called when an animal changes to fit its environment?
- 4. What is the word for when an animal species is no longer on this Earth?
- 5. You ________ DNA off your parents when you're born?
- 7. What is an old rock called?