Across
- 3. Same function but different arrangement.
- 4. Layer in the fossil record with older samples.
- 7. Change in a gene(Helpful, Harmful, Neutral)
- 8. Layer in the fossil record with younger samples.
- 11. Mutations develop over generations to create new genetic variations that become new species.
- 12. Helps place important events and species in the appropriate era and show changes over time.
- 13. No function but still exist in the body.
Down
- 1. Assumed in organisms with very similar DNA strands.
- 2. Different function but similar arrangement.
- 5. Study of early features and development.
- 6. Closely related organisms have similar structures because of similar amino acids.
- 9. Supercontinent that existed millions of years ago.
- 10. Populations of same species living in different places become increasingly different as they adapt to environment.