Unit 4 Vocab

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Across
  1. 11. Process by which traits that improve an organism’s chances for survival and reproduction are passed on more frequently to future generations
  2. 12. Similarity in function and superficial resemblance of structures that have different origins
  3. 13. A change in a population’s gene pool
  4. 14. Prevents two different species from interbreeding with one another
  5. 15. Similar structures that evolved from a common ancestor
  6. 16. Separation of organisms as a result of change in their ecology or the environment in which they live
  7. 17. Reproductive events prevent members of closely related species, which could otherwise breed with one another
  8. 18. Occurs when biological populations become geographically isolated from each other to an extent that prevents or interferes with gene flow
  9. 19. The disappearance of a species from Earth
  10. 20. Describes how reproductively successful an an organism is in its environment
  11. 21. An individual with high fitness produces more offspring and therefore passes on its genes more frequently than an individual with low fitness
Down
  1. 1. Structures that have no apparent function and appear to be residual parts from a past ancestor
  2. 2. Process by which new species are generated
  3. 3. Process of selection conducted under human direction
  4. 4. A heritable trait that increases an individual’s fitness
  5. 5. Biological evolution that occurs by chance
  6. 6. Changes in DNA
  7. 7. A sequence of DNA that codes for a particular trait
  8. 8. The total number of genetic characteristics in the genetic makeup of a species
  9. 9. Preserved remains, or traces of remains, of ancient organisms
  10. 10. Occurs when members of a population diverge in their behaviors over time