AP BIOLOGY

Detailed explanation-1: -Ethylene is a gas and is known as the “fruit-ripening hormone.” Every fruit has a certain level of ethylene production throughout its lifecycle. However, in some fruits, ethylene levels shoot up when the fruit starts ripening.

Detailed explanation-2: -Ethylene is permitted for artificial ripening provided if the concentration does not exceed 100 ppm (parts per million). Ethylene plays a vital role in the natural ripening of fruits. It is a hormone produced naturally within the fruits to stimulate ripening process.

Detailed explanation-3: -Ethylene is a gaseous plant hormone that causes the ripening of fruits. It is synthesized in a large amount in the fruits and tissues undergoing ripening and senescence, respectively.

Detailed explanation-4: -Ethylene: ↑ A gas (C2H4) produced by plants, and known as the “ripening hormone, ” which stimulates fruit ripening.