Chapter 11 Changes Over Time

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Across
  1. 4. Species that could become endangered.
  2. 6. The number of different species in an area.
  3. 8. Species that are in danger of becoming extinct.
  4. 12. When members of a species must compete with other members of the same species and other organisms for food, space and other resources, which are limited.
  5. 14. Any difference between individuals of the same species.
  6. 16. Segments of DNA that determine characteristics in an organism.
  7. 17. A well-supported and widely accepted explanation of nature.
  8. 18. The process by which individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species.
Down
  1. 1. The role of an organism in its habitat, or how it makes its living.
  2. 2. One factor that can affect biodiversity in an ecosystem.
  3. 3. When all the members of a species disappear from the Earth.
  4. 5. When only organisms with a desired trait are bred.
  5. 7. A trait that increases an organism's ability to survive and reproduce
  6. 9. The genetic material inside a cell that carries information about an organism.
  7. 10. Change over time. This theory explains how living things descended from earlier organisms.
  8. 11. Structures that are similar that related species have inherited from a common ancestor.
  9. 13. One factor that can affect biodiversity in an ecosystem.
  10. 15. Diversity in which species with a diverse gene pool are better able to adapt to and survive changes in the environment.