Roots :Carrot:: Stem:?

In plants like potato, Ginger, Onion food is stored in stem part.

This analogy is based on the part of the plant used for storage of food. In the given pair, "Roots : Carrot," the carrot represents an edible root that stores nutrients for the plant. Similarly, for the stem, the options potato, ginger, and onion are all modified stems used for storage, making "All the above" the correct choice.

Explanation

1. Potato:
   The potato is a tuber, a swollen underground stem that stores starch. It develops from the stolons of the potato plant, and its "eyes" are actually buds that can grow into new plants.
2. Ginger:
   Ginger is a rhizome, a horizontal underground stem that stores nutrients and aids in vegetative reproduction. It has nodes and internodes, which distinguish it as a stem.
3. Onion:
   Onion is a bulb, which is a modified underground stem with fleshy leaves. The stem is the central basal plate from which the leaves and roots emerge.

Why "All the above"?

All three—potato, ginger, and onion—are examples of modified stems that perform the function of storage and reproduction for the plant. Each has a distinct structure (tuber, rhizome, or bulb) but serves a similar purpose in the plant's lifecycle.

This analogy highlights how different plant parts, such as roots and stems, are specialized for various functions like storage, growth, and reproduction.