Across
- 4. developed over generations
- 7. living organisms adapt and change
- 8. a large group of single-cell microorganisms
- 10. influenza,COVID,pneumonia
- 11. has no nucleus
- 15. two individuals creating one
- 16. loss of genetic variation
- 18. complete disappearance of a species
- 19. what organisms do to survive
- 20. sharp reduction in the size of a population
Down
- 1. membrane-bound organelles
- 2. process of formation of new species from existing populations
- 3. a change in a trait
- 5. how bacteria reproduces
- 6. change in frequency of an existing gene
- 9. study of embryos
- 12. bacteria change in response to the use of medicines.
- 13. transfer of genetic material from one population to another
- 14. alternative form of a gene
- 17. species becomes better suited to its environment.