| Answer | Crossword Clue |
|---|---|
| ECOTYPES | Groups adapted to their environments |
| ECOTYPES | Groups that have adapted to their environments |
| ECOTYPES | Subspecies adapted to their environments |
| ECOTYPES | Subspecies especially adapted to their environments |
| ethologic | relating to ethology, the study of animals' behavior in their natural environments also ETHOLOGICAL |
| paleoecology | a branch of ecology that is concerned with the characteristics of ancient environments and with their relationships to ancient plants and animals |
| paleoecologies | PALEOECOLOGY, a branch of ecology that is concerned with the characteristics of ancient environments and with their relationships to ancient plants and animals |
