Question

Sweet potatoes reproduce from
(a) Modified leaves
(b) Modified stem
(c) Modified roots
(d) Modified flowers

Answer 1

Hint: vegetative parts of the plants are modified to perform functions other than their own functions. In sweet potato, the vegetative parts that are modified to store food also help in reproduction.

Complete answer:
Roots in some plants are modified to perform certain functions other than absorption and conduction of water and minerals. Roots in plants are modified to storage roots, prop roots, stilt roots, pneumatic roots, velamen roots, haustorial roots, nodular roots, photosynthetic roots.
Some of the underground stem modifications are stem tuber, rhizome, corm, and bulb. Stems in potatoes are modified to store food and in sweet potatoes, adventitious roots are modified to store food. They are also used in vegetative reproduction.

Additional Information: - In order to survive in unfavorable conditions, vegetative parts like roots, stems, and leaves in plants undergo some modifications.
- Underground stems are modified into stem tuber, rhizome, corm, and bulb, aerial stems are modified into stem tendrils, thorns, phylloclades, cladophylls, and bulbils.
- in roots, the primary roots and their branches constitute the taproot system. If the roots originate from the base of the stem are called fibrous roots. If the roots perform functions other than their normal functions, then they are called adventitious roots.
- Roots in plants are modified to storage roots, prop roots, stilt roots, pneumatic roots, velamen roots, haustorial roots, nodular roots, photosynthetic roots.
So, the correct answer is ‘modified roots’

Note: -Not only roots and stem of the plant undergo modification but leaves also get modified to tendrils, spines, phyllodes, insectivorous leaves, and leaves that help in vegetative propagation.
-In colchicum, leaves are modified to tendrils.
-Some of the other examples of root modification for storage are modified taproot in carrot and turnip, modified fibrous root in asparagus.