Across
- 4. The reproduction of viruses using a host cell to manufacture more viruses; the viruses then burst out of the cell.
- 6. A branch of science that is related to the formation, growth, and development of embryos.
- 9. The process through which populations of living organisms adapt and change.
- 11. Cell type that does contain a nucleus and most other membrane-bound organelles.
- 13. The biological mechanism by which organisms adjust to new environments or to changes in their current environments.
- 14. Different organisms vary in how they look and function because they have different inherited information.
- 15. The complete disappearance of a species from Earth.
- 17. Asexual reproduction by a separation of the body into two new bodies.
- 19. One parent copies itself to form a genetically identical offspring.
- 20. Cell type that does not contain a nucleus and most other membrane-bound organelles.
Down
- 1. An organism combines the genetic information from each of its parents and is genetically unique.
- 2. A type of structural modification made to a part of the body.
- 3. The reduction in genomic variability that occurs when a small group of individuals becomes separated from a larger population.
- 5. Something an animal does usually in response to some type of external stimulus in order to survive.
- 7. A large group of single-cell microorganisms.
- 8. When germs like bacteria and fungi develop the ability to defeat the drugs designed to kill them.
- 10. The change in frequency of an existing gene variant in the population due to random chance.
- 12. A permanent change in the DNA sequence that makes up a gene.
- 16. When a group within a species separates from other members of its species and develops its own unique characteristics.
- 18. A term that describes mechanisms of gene transfer from one population to another.