Species Relatedness

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Across
  1. 3. a genetically determined characteristic.
  2. 6. shared ancestor of multiple species or groups.
  3. 8. structures that are adapted for the same environment, but do not come from a common ancestor.
  4. 9. process that determines the precise order of nucleotide bases (adenine, guanine, cytosine, and thymine) within a DNA strand.
  5. 10. newer rocks are on the top and older rocks are at the bottom.
Down
  1. 1. word meaning "body structure".
  2. 2. the process by which organisms better adapted to their environment tend to survive and reproduce more successfully, passing on their favorable traits to future generations.
  3. 4. structures that are similar and passed down from a common ancestor.
  4. 5. the remains or impressions left behind by prehistoric organisms.
  5. 7. random change in DNA sequence, resulting in a new genotype.