Question

Which of the following groups of plants are propagated through underground roots?
A. Bryophyllum, and kalanchoe
B. Ginger, potato, onion, jimikand
C. Pistia, chrysanthemum and pineapple
D. Sweet potato, asparagus, tapioca and dahlia

Answer 1

Hint: Functions of root are absorption of water and nutrients, transportation of water and nutrients to stem, anchor plant to maintain stability, storing food and water. Plant propagation is the reproduction of new plants from seeds and vegetative parts, such as leaves, stem or root.

Complete Answer:
- Plant propagation from the vegetative part of a parent plant through asexual mode is known as vegetative propagation.
- Vegetative propagation uses several of the plant parts for reproducing the plant asexually. It used to get the similar genetic background of mother plants. This is possible because of the presence of meristematic tissue capable of cellular differentiation, in many plant tissues.
- A part of stem, root and leaf can promote adventitious roots and form a new plant. Some other plants have swollen fleshy roots called root tubers.
- Tubers bear buds, which can develop into new plants if covered with moisture soil, example sweet potato, dahlia, yam, tapioca and asparagus.

Thus, the option (D) is correct.

Note: Root has two types, they are taproot, fibrous system. Types of vegetative propagation are cuttings, layering, grafting. Functions of stem are transport water and nutrients from roots to leaves, supports leaves, fruit, flower and another one is storing food. Three principal organs of the seed plant are roots, stem, and leaves. Buds are where vegetative or floral growth happens. Node is the part of the stem where the leaves and lateral buds are joined to steam.