Question

Identify the root which is characterised by the swollen apex and tapered end.
A) Conical
B) Napiform
C) Fusiform
D) Prop

Answer 1

Underground roots are mostly modified to store food, like carrot, beetroot, radish, turnip, etc. Based on their shape, they are classified into four types of roots.

Complete answer:
Root is generally the underground part of the plant which is generated from hypocotyl, originating from the radicle.
The usual functions of roots are absorption, storage, as an organ of perennation, etc. There are two types of root system; taproot and fibrous root. The former originates from radicle, while the later is formed by the base of the stem, even though the exact origin is radicle itself.

So now let us analyze each of the options given above:

Option A: Conical- In this type, roots are wider and swollen at the apex, and pointed and tapered at the proximal end. Example; carrot. Therefore, this is the correct option.
Option B: Napiform- In this type, the root is nearly spherical in shape, being pointed at the end. Example; turnip and beet. Therefore, this is the incorrect option.
Option C: Fusiform- This is a kind which tapers at both the ends, being slightly swollen at the middle. Example; radish. Therefore, this is the incorrect option.
Option D: Prop- Prop roots are the ones which arise from the stem, providing aerial support. This is a kind of adventitious roots. Example; Ficus bengalensis. Therefore, this is the incorrect option.

Thus, the correct answer is option (A).

Note: The roots modified for storage are fleshy, as they absorb food from other parts. There are buds arising on them, which emerges as a new plant, when conditions are favourable.