Across
- 3. drift - change in gene pool
- 8. effect- few individuals become isolated
- 10. - germ
- 12. cells - membrane-bound nucleus
- 13. adaptations-
- 14. Trait carrier
- 16. fission- cell splitting into two
- 17. One species splits into two or more
- 18. Reproduction - sperm and egg cell
Down
- 1. effect - drastic reduction
- 2. resistance-
- 4. - Pouch
- 5. coexistence
- 6. selection - darwin
- 7. Evidence - Best evidence
- 9. flow - maintaining or losing alleles
- 11. Reproduction- Offspring Identical to parent
- 14. Structures- Penguin V. Whales
- 15. - death
- 18. Selection - Peacocks