Multiple choice ____ is a one-seeded fruit in which the pericarp becomes hard and woody. Achene Cypsela Caryopsis Nut Reveal answer Fill a bubble to check yourself D Correct answer Explanation A nut is a dry, indehiscent, one-seeded fruit characterized by a hard, woody pericarp. Achenes and caryopses have thinner pericarps, while cypsela is specific to the Asteraceae family.