Question

Which of the following is a type of underground stem?

• A. Tuber
• B. Corm
• C. Bulb
• D. All of the above

Answer 1

The correct option is D All of the above

Tuber, corm and bulb are all different types of underground stem modifications. Tuber is usually a short and thickened structure with starch stored in it and also shows presence of nodes. For example- potato. Corm is an unbranched swollen underground stem having circular nodes that have buds for growth of daughter plants. For example- Colocasia. In a bulb, the stem is shortened down to a disc often called the basal plate. The roots arise from the edge of the basal plate. For example- onion.