evolution and natural selection

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Across
  1. 2. Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success
  2. 6. the fact or process of a species, family, or other group of animals or plants becoming extinct.
  3. 7. features of an organism that are considered to have lost much or all of their original function through evolution.
  4. 10. provided when a person is given antibodies to a disease rather than producing them through his or her own immune system
  5. 11. particular section, group, or type of people or animals living in an area or country.
  6. 12. the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.
  7. 13. the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.
  8. 16. all organisms are related to one another
  9. 18. the branch of biology and medicine concerned with the study of embryos and their development.
  10. 20. a substance used to stimulate immunity to a particular infectious disease or pathogen, typically prepared from an inactivated or weakened form of the causative agent or from its constituents or products.
Down
  1. 1. relating to the chemical processes and substances which occur within living organisms.
  2. 3. evidence for evolution because it would show intermediate forms of a species and they changed and accumulated adaptations at a slow pace
  3. 4. the formation of new and distinct species in the course of evolution.
  4. 5. An agent that kills a virus or that suppresses its ability to replicate and, hence, inhibits its capability to multiply and reproduce.
  5. 8. a change or the process of change by which an organism or species becomes better suited to its environment.
  6. 9. the genetic constitution of an individual organism.
  7. 14. proteins that protect you when an unwanted substance enters your body.
  8. 15. the immunity which results from the production of antibodies by the immune system in response to the presence of an antigen.
  9. 17. the change in frequency of an existing gene variant in the population due to random chance
  10. 19. the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.