Question

Clinging roots are found in
A. Orchids
B. Trapa
C. Podostemon
D. Screwpine

Answer 1

Root system of a plant continuously provides nutrients and water to the shoot system. It supports the whole plant body. It is of three types:

Taproot ( from the large central and dominant root, other roots are sprout laterally)
Fibrous ( formed by thin moderately branching roots growing from the stem)
Adventitious ( roots that form from any non-root part of the plant)
Clinging roots are examples of the adventitious root. They are called hygroscopic roots which are observed in epiphytes or space parasites. These are entities dwelling on the surface of other plants.

Complete answer:
Orchids: It is derived from the Greek word Orchis for testicle because of the shape of root tuber. It is a member of order Asparagales. They have other adaptations that help them to survive in their unique environment. It shows the clinging root system because orchids are epiphytes.
Trapa: It is also known as water chestnut which is an annual, floating leaved aquatic plant. It belongs to the family Trapaceae. They have the photosynthetic assimilatory type of root system.
Podostemon: It belongs to the Podostemaceae family. It is an aquatic plant with thread-like roots that attaches the rocks. They have sessile involucrate flowers and poorly differentiated leaves. They have a plagio-tropic, dorsive central root system.
Screwpine: it is a monocot plant. They are palm-like, dioecious trees and shrubs. They look like palm trees with long, thick, dark-green leathery leaves, shaped like swords. They commonly have thick stilt root systems which provide support to the heavy top.

So, (A) is the correct answer.

Note:
In the above, we detailed the root system of every plant and different types of roots. The root is the basic part of a plant which has many functions such as storing food, supporting and anchoring the plant and absorption of water and minerals.