Crossword clue: the branch of biology concerned with the relations between organisms and their environment

The most common answer is bionomics (9 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

bionomics 9 letters wn-def

the branch of biology concerned with the relations between organisms and their environment

ecology 7 letters wn-def

the branch of biology concerned with the relations between organisms and their environment