Question

Fusiform, napiform, and conical roots are the modifications of -

• A. Tap roots
• B. Adventitious roots
• C. Aerial roots
• D. Stilt roots

Answer 1

The correct option is A

Tap roots

The correct option is A.

Explanation of the correct option:

1. Taproots are the primary root of a plant. These are mainly seen in dicot plants.
2. Fusiform, napiform, and conical roots are the modifications of the taproots of the plant.
3. Conical roots: These have a broad base and conical shape, e.g. carrot.
4. Fusiform roots: such roots are swollen in the middle portion and tapering towards the end, e.g. radish.
5. Napiform roots: These roots are tapering at the apex and spherical at the base, e.g. turnip.
6. Tuberous roots: these are thick and fleshy roots modified for food storage, dahlia.

Figure showing various modifications of taproots:

Explanation of the incorrect options:

Option B:

Adventitious roots are non-root tissues. These roots arise from anywhere in the plant but not the main roots.

Option C:

Aerial roots arise above the ground. They help the plant to absorb water and nutrients.

Option D:

Stilt roots are adventitious roots that arise from the base of the stem nodes. They provide mechanical support to the plants.

Final answer: Fusiform, napiform, and conical roots are the modifications of the taproot.