biology

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Across
  1. 2. Any difference between individuals of the same species.
  2. 3. information about past life, including the structure of organisms, what they ate, what ate them, in what environment they lived, and the order in which they lived
  3. 4. A record of the geologic events and life forms in Earth's history.
  4. 7. changes over time
  5. 9. A change in a gene or chromosome.
  6. 10. Breeding organisms with specific traits in order to produce offspring with identical traits.
Down
  1. 1. A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits.
  2. 5. A term that typically describes a species that no longer has any known living individuals.
  3. 6. A trait that helps an organism survive and reproduce
  4. 8. A trace of an ancient organism that has been preserved in rock.