Evolution and Natural Selection

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Across
  1. 5. describes how the individuals are distributed, or spread throughout their habitat.
  2. 7. One of two or more DNA sequences occurring at a particular gene locus.
  3. 10. a term that describes mechanisms of gene transfer from one population to another.
  4. 12. one parent copies itself to form a genetically identical offspring
  5. 16. organisms best adjusted to their environment are the most successful in surviving and reproducing.
  6. 18. the process through which populations of living organisms adapt and change
  7. 19. the difference in DNA sequences between individuals within a population.
  8. 20. When two organisms create a third organism through reproduction, a number of variables come into play
Down
  1. 1. organisms whose cells contain a nucleus and other membrane-bound organelles.
  2. 2. when a group within a species separates from other members of its species and develops its own unique characteristics.
  3. 3. organisms whose cells lack a nucleus and other organelles.
  4. 4. the reduction in genomic variability that occurs when a small group of individuals becomes separated from a larger population.
  5. 6. the way in which a reduction and subsequent increase in a population's size affects the distribution of genetic variation among its individuals.
  6. 8. how a new kind of plant or animal species is created.
  7. 9. something an animal does usually in response to some type of external stimulus in order to survive.
  8. 11. the complete disappearance of a species from Earth.
  9. 13. type of structural modification made to a part of the body
  10. 14. an organism combines the genetic information from each of its parents and is genetically unique.
  11. 15. the change in frequency of an existing gene variant in the population due to random chance.
  12. 17. a branch of science that is related to the formation, growth, and development of embryo.