Evolutionary Relationships

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Across
  1. 4. A type of history that sequence of heritable changes that occurred among species since the origin of life on Earth.
  2. 6. To change the frequencies of alleles in a population over time.
  3. 7. When evolutionary change does occur, it happens quickly in bursts.
Down
  1. 1. When organisms are descended from a single ancestor.
  2. 2. Changes occur gradually and sequentially.
  3. 3. A type of structure meaning similar.
  4. 5. The study of the structures of organisms and their parts.