Evolution and Natural Selection

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Across
  1. 3. something an animal does usually in response to some type of external stimulus in order to survive
  2. 6. are small and microscopic, it is not visible to the naked eye
  3. 8. when the viral DNA gets intergrated into the hosts cell DNA and forms a new genetic material
  4. 10. directed breeding to produce plants and animals with desired traits
  5. 12. the process by which individuals compete for access to mates and fertilization opportunities
  6. 13. how a new kind of plant or animal species is created
  7. 14. theory of evolution based on excess reproduction, variations, inheritance, and the advantages of specific traits in an environment
  8. 19. any heritable trait that helps an organism survive and reproduce in its environment
  9. 20. an infection that can only replicate within a host organism
Down
  1. 1. any part of an organism's biology that helps them specifically to survive in their ecosystem
  2. 2. reproduction in which a new offspring is produced by a single parent
  3. 4. the production of new organisms by the combination of genetic information of two individuals of different sexes
  4. 5. one of two or more versions of a genetic sequence
  5. 7. species that have been living together for so long that they have influence one another evolution
  6. 9. the study of the formation and development of an embryo and fetus
  7. 11. a series of stages in which a virus hijacks a host cell, uses its components to manufacture more of the virus
  8. 15. hereditary changes in groups of living organisms over time
  9. 16. any difference between the individuals in a species or groups of organisms of any species
  10. 17. the dying out or extinction of a species
  11. 18. tiny single celled organisms that get nutrients from their environments