Across
- 5. when germs and fungi develop a resistance to the drug used to kill them
- 7. something a animal does usually in response to some sort of external stimulus in order to survive
- 10. any cell or organism that processes a clearly defined nucleus
- 12. any heritable trait that helps an organsism
- 13. on parent copies it self to form a genetically identical offspring
- 14. the change in frequency of an existing gene variant in the population so to random chance
- 15. any organism that lacks a nucleus or other organelles
- 17. the dying out of extermination of a species
- 19. when populations of living organisms adapt and change
- 20. a branch of science that is related to the formation, growth, and development of an embryo
Down
- 1. choosing parents with particular characteristics to breed together and produce offspring
- 2. different organisms independently evolve similar traits
- 3. an organism combines the genetic information from each of the parents and are unique
- 4. the process which interbreeding species diverge two or more evolutionary groups
- 6. an infectious segment of nucleic acid surrounded by a protein
- 8. type of structural modification made to part of a body
- 9. a term that describes mechanisms of gene transfer from one population to another
- 11. one of two or more alternative forms of genes that arise from a mutation and are found on the same place of a chromosome
- 16. when a group within a species separates from other members of the species and develops its own characteristics
- 18. a small single celled organism