Question

Pappus is modification of
A. Bracts
B. Bracteoles
C. Corolla
D. Calyx

Answer 1

Hint: When the calyx adapts to form the hairy or feathery structure as well as it persists in fruits to permit the dispersal, then calyx is said to be changed into pappus. It is a key feature of the family Asteraceae.

Complete answer:
Option A – In biology, a bract is a specialized leaf, especially one which is associated with a reproductive structure like a flower, inflorescence axis or cone scale.

Option B – Bracteole is a small leaf or leaf-like structure which is directly subtending a flower or an inflorescence whose stalk itself is subtended by a bract.

Option C – All petals together with flowers, are known as the corolla. The calyx (set of leaves), as well as corolla together, are collectively known as tepals.

Option D – Petals of a flower are usually accompanied by another set of special leaves such as structures called sepals, that collectively form the calyx present just beneath the corolla. The calyx, as well as the corolla together, make up the perianth. It is a feature of the family Asteraceae

Hence, the correct answer is option (D).

Note: The pappus is the process of calyx adapting. It is the part of an individual floret that surrounds the foundation of the corolla tube in flower heads of the plant family called Asteraceae. In species like Dandelion or Eupatorium, the hairy or feathery bristles of the pappus function as a "parachute" which allows the seed to be carried by the wind.