Question

Radish has
a. Napiform root
b. Conical root
c. Fusiform Root
d. Tuberous root

Answer 1

Hint: Roots are the cylindrical, underground and non-green part of the plant. It lacks nodes, leaves and buds but gives rise to endogenous lateral branches. Roots are positively geotropic and negatively phototropic.

Complete answer:
Plants have well developed root systems and the main root and lateral branches together forms the root system. There are three types of root system:
- Tap root system: Dicots.
- Fibrous root system: Wheat.
- Adventitious root system: Grass, Banyan tree.

Main function of roots:
- They are involved in absorption of water and minerals from the soil.
- It provides anchorage to the plant parts.
- It is involved in the storage of reserve food material.
 -It is involved in synthesis of plant growth regulators.
The roots are mainly involved in the absorption of water and minerals from the soil. Roots in several plants undergo some modification in their shape and structure in order to perform functions like respiration, storage and protection.

- Napiform roots: These roots are globular or spherical in structure. It is very broad at the top and the bottom. e.g., Turnip.

- Conical roots: In this root tuber is in conical shape i.e. wider at the top and tapering towards the bottom. e.g., Carrot.

- Fusiform roots: This root is wider in the middle and tapering towards the top and bottom. e.g., Radish.

- Tuberous roots: This root is a modified lateral root, enlarges to function as a storage organ. e.g., Sweet potato and dahlia.

Hence, the correct answer is option (C).

Note: The roots which are mentioned in the question are the sub category of tap roots. Tap roots are directly elongated from the radical and grow inside the soil. In some plants the primary tap root is modified to store food, these types of roots are also called storage roots.