Question

Fusiform roots are found in
a. Solanum tuberosum
b. Colocasia
c. Daucus carota
d. Raphanus sativus

Answer 1

Hint: Roots are one of the essential part of the plant, and their function is to provide the anchorage for the plants and they are helps for the conduction of water and nutrients from the soil to plant body, where this allows the plants to grow taller and faster. Most of the roots lie below the surface of the soil, and roots can also be aerated where they grow above the water level.

Complete answer:
Roots are classified mainly into two types that are primary and secondary roots, where they are also called lateral roots. Different types of roots are found in the plants and among them tap roots are one of the common types of roots, which are usually found in the plants.
These tap roots may undergo the modification, where they are modified into 3 types namely Fusiform, Napiform and conical type.In general, the plant with a tap root system is that where the tap root is central and dominant, and this root is very thick and straight.
This fusiform root is very wide at the middle and tapers at the top as well as at the bottom.

Features of the fusiform roots
- They are spindle shaped in outline, and the apical region of the roots normally shows the tapering.
- From the germinating seed, the root formed part is hypocotyl, where half or less than half of the fleshy roots are formed of the hypocotyl
- They form the fleshy roots, and they have very fine thread like secondary roots, where they do not occur in the basal swollen part but at the remaining half
- Example of the fusiform root is radish and the scientific name is Raphanus sativus.

Hence, the correct answer is option (D).

Note: Other type of modifications of tap root are napiform, which means that it is broad at the top and suddenly like a tail at the bottom, and conical type is another modification where it is cone in shape, wide at the top they taper steadily at the bottom.