Tracker dogs, given a scent of a person's clothing and thus their carboxylic acid mixture (mainly butanoic acid), can then recognize and follow that scent to track the individual concerned.
Ant bite sting because of the formic acid released by ants. Acetylsalicylic acid, the chemical name for aspirin, is an important analgesic (pain killer). Aspirin is an effective pain reliever and anti‐inflammatory drug to help us combat headaches, colds, flu, backache, toothache, etc.,
The significant odor of goats is due to caproic acid (hexanoic acid) and that of rancid butter is because of butanoic acid.
The green apples are sour due to the presence of malic acid. It is also present in grapes and in most wines. In the grape wine, malic acid is involved in many processes which are essential for the health and sustainability of the wine.
Silk is the result of polymerization of carboxylic acid derivatives called amino acids into proteins. The smell of bananas is due to the chemical ‐ isoamyl acetate, an ester (carboxylic acid derivative).