Question

Beetroot, turnip and sweet potato are modified:

• A. Stem
• B. Leaf
• C. Root
• D. Branch

Answer 1

The correct option is C

Root

Explanation of the correct option:

The correct option is C.

1. The roots that change their structures to store food and provide additional support to plants are known as modified roots.
2. The roots are sometimes swollen to store food by acquiring various types of shapes. For example: roundish(turnip, beetroot), tuberous(sweet potato).
3. Beetroot, turnip, and sweet potato have swelling taproots that are used to store food.

Explanation of the incorrect option:

Option A:

1. Stems of most plants grow above the ground but some stems that grow below the ground are called underground stems.
2. The underground stems store large quantities of food in the form of tuber, rhizome, bulb, and corm.
3. The potato is an example of a tuber. The lower branches of the potato stem grow underground and swell at the tips to store food.

Option B:

1. The flat, green and broad parts of the shoot that are located on the node of the stem are the leaves.
2. Sometimes the leaves undergo modifications to perform various functions such as support and protection
3. Modifications of leaves include leaf tendrils (sweet pea), spines(cactus), and scaly leaves(onion).

Option D:

1. Branches are woody structures that play an important role in structural support for different parts of the plant such as leaves, flowers and fruits.

Final answer: Beetroot, turnip and sweet potato are modified roots.