Queried GO terms:

  idGO:0070482   Detailed information
  nameresponse to oxygen levels
  namespacebiological_process
  def"Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a stimulus reflecting the presence, absence, or concentration of oxygen." [GOC:BHF, GOC:mah]
  is_aGO:0042221 ! response to chemical stimulus

No monarch genes has this GO term.