Changes Over Time

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Across
  1. 3. Any difference between individuals of the same species
  2. 6. The theory that evolution occurs slowly but steadily
  3. 7. The gradual change in a species over time.
  4. 8. A group of similar organisms that can mate and produce fertile offspring.
  5. 9. The process by which individuals that are better adapted to their environment are more likely to survive is called natural
  6. 10. The preserved remains of an organism.
Down
  1. 1. The theory that evolution occurs during short periods of rapid change is punctuated
  2. 2. A trait that helps an organism survive and reproduce
  3. 4. A fossil formed when an organism buried in sediment dissolves, leaving a hollow area
  4. 5. Similar structurs that related species inherited from a common ancestor
  5. 7. No members of a species are still alive.