Crossword puzzle clue "they need oxygen"

Here are the possible solutions for they need oxygen clue

Answer
Clue
Relevancy
aerobes
Clue
They need oxygen
Organisms that need oxygen
Bacteria that need oxygen
Definition
AEROBE, an organism that requires free oxygen, also AEROBIUM
aerobics
Clue
Exercise that increases the need for oxygen
Definition
exercise for conditioning the heart and lungs
anaerobe
Clue
One doesn't need oxygen
It doesn't need oxygen
Bacterium that doesn't need oxygen
Definition
an organism that lives in absence of free oxygen
gills
Clue
They extract oxygen from water
Definition
GILL, to catch fish in a gillnet

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