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David
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Insects are highly developed to respond to smell. The fruit fly, Drosophila melanogaster, has genes for over 50 odorant-binding proteins which can be found here and genes for over 120 chemoreceptors, which include both odorant receptors and gustatory receptors.

There is a link to the FlyBase entry for each gene where further information can be found.

There is less information about other insects, but indications are that each has a large repertoire, honed to its particular sources of food.

David
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  • 8
  • 53
  • 95