unit 11 vocab

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Across
  1. 3. form of reproductive isolation in which two populations are separated by geographic barriers such as rivers, mountains, or bodies of water, leading to the formation of two separate subspecies
  2. 5. form of reproductive isolation in which two populations develop differences in courtship rituals or other behaviors that prevent them from breeding
  3. 6. structure that is inherited from ancestors but has lost much or all of its original function
  4. 9. form of natural selection when individuals at one end of a distribution curve have higher fitness than individuals in the middle or at the other end of the curve
  5. 10. heritable characteristic that increases an organism's ability to survive and reproduce in an environment
  6. 14. form of reproductive isolation in which two or more species reproduces at different times
  7. 16. process by which organisms that are most suited to their environment survive and reproduce most successfully; also called survival of the fittest
  8. 17. change over time; the process by which modern organisms have descended from ancient organisms
  9. 18. formation of a new species
  10. 19. separation of a species or population so that they no longer interbreed and evolve into two separate species
Down
  1. 1. structures that are similar in different species of common ancestry
  2. 2. natural selection in which individuals at the upper and lower ends of the curve have higher fitness than individuals near the middle of the curve
  3. 4. body parts that share a common function, but not structure
  4. 7. selective breeding of plants and animals to promote the occurrence of desirable traits in offspring
  5. 8. how well an organism can survive and reproduce in its environment
  6. 11. form of natural selection in which individuals near the center of a distribution curve have higher fitness than individuals at either end of the curve
  7. 12. when individuals select mates based on heritable traits
  8. 13. preserved remains or traces of ancient organisms
  9. 15. all the genes, including all the different alleles for each gene, that are present in a population at any one time