| Answer | Crossword Clue |
|---|---|
| atavism | the reappearance of ancestral characteristics |
| atavisms | ATAVISM, the reappearance of ancestral characteristics |
| atavist | the reappearance of remote ancestral traits |
| atavism | the reappearance of remote ancestral traits |
| atavists | the reappearance of remote ancestral traits |
| cladist | a system of biological taxonomy that defines taxa uniquely by shared characteristics not found in ancestral groups and uses inferred evolutionary relationships to arrange taxa in a branching hierarchy such that all members of a given taxon have the same ancestors |
