Question

Ginger is an example of the following modification(a) Rhizome
(b) Bulb(c) Corm
(d) Tuber

Answer 1

Hi Dear

Rhizome-Ginger

Bulb-Onion

Corm--Colocasia

Tuber-Potato.

hope it helps

Answer 2

Answer:

Ginger is an example of (a) Rhizome.

Explanation:

• Some perennial herbs develop their stems underground for perennation during unfavourable, adverse conditions.

• The stem produces aerial branches every year when conditions become favourable.

• The underground stems are usually very thick as a result of heavy deposits of food within them and hence they also act as storage organs.

• Besides they also help in vegetative propagation utilizing their buds.

These stems are non-green and leafless like roots but differ from them in the following way:

1. Presence of nodes and internodes, scale leaves, axillary and terminal buds.

2. Absence of root hair and root cap.

• Rhizome represents one of such underground modifications of stem found in Ginger.

• The rhizome is colourless and leafless and, therefore can be mistaken for roots.

• It is a thick and prostrate stem. It grows horizontally forward under the soil surface. It is provided with very distinct nodes and internodes, scale leaves.
• Generally branched and possess several axillary and terminal buds. It bears adventitious roots all over.
• Examples are Canna, Zingiber (ginger), Curcuma (turmeric) etc.  
• The rhizome is fleshy and branched in Ginger and turmeric but not in Canna.  
• Other underground stem modifications include Bulb (Onion), Corm (Amorphophallus) and Tuber (Potato).

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