Evolution and Natural Selection

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Across
  1. 2. occurs when bacteria change in response to the use of these medicines, making the medicine useless
  2. 4. the proccess pf reproducing using to organism
  3. 6. provides a record of how creatures evolved, mostly represented by a "tree of life"
  4. 13. a permanent change in the DNA sequence that makes up a gene
  5. 14. a group of single celled micororgansisms that could cause infections an diseases
  6. 15. when a group of similar species separate to create its own unique characteristics
  7. 17. the change in frequency of an existing gene variant in the population due to a random event
  8. 18. actions that help animals survive based on a response to some type of stimulus
  9. 20. one of two or more DNA seuqnces occuring at a partciluar gene locus
Down
  1. 1. the process of reproducing using only one organism
  2. 3. a heritable trait that helps an organism,such as plants or animals, survive and reproduce in its environment
  3. 5. cells that contain membrane bound organelles
  4. 7. a very simple microorganism that infects cells and may cause a disease
  5. 8. the dying out or extermination of a species
  6. 9. refers to the reduction in genomic variability that occcurs when a small group of individuals separate form a larger population
  7. 10. the organisms that have most adapted to the environment around them will survive
  8. 11. differences in traits among individuals of the same kind of living thing
  9. 12. the movement of genes from one population to another
  10. 16. a type of structual modifictaion made to a part of the body that helps an organism survive
  11. 19. organisms that lack membrane bound organelles and other organelles