An unripe lemon that is placed in a paper bag with an apple will ripen; its skin will yellow, it will soften, and it will produce the characteristic lemon odor.Which plant hormone released by the apple causes this effect?
A) Auxin
B) Ethylene
C) Cytokinins
D) Gibberellins
E) Abscisic acid

Question

Quizplus · Accepted Answer

Ethylene is the plant hormone that promotes fruit ripening and is released by apples. When an unripe lemon is kept in a paper bag with an apple, the apple releases ethylene which triggers the ripening process in the lemon. The ripening process includes yellowing of the skin, softening of the fruit, and the production of the characteristic lemon odor. Auxin, cytokinins, gibberellins, and abscisic acid are not involved in the ripening process.

An Unripe Lemon That Is Placed in a Paper Bag