Biological Evolution

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Across
  1. 2. the arrangement of and relations between elements
  2. 3. the amount of a species.
  3. 5. a genetically determined characteristic.
  4. 6. having the same structural features and pattern of genes.
  5. 7. Genetics determined by one's parents or ancestors.
  6. 8. genes or hereditary.
Down
  1. 1. Structure traits that have no apparent function.
  2. 3. a fact or situation that is observed to exist or happen.
  3. 4. a persons chilled or ancestor.