Question

In potato, sugarcane, banana, ginger and Dahlia, the new plantlets invariably arise from

• A. The nodes present in the modified stems
  
• B. The internodes present in the modified stems
  
• C. The nodes present in the modified roots
  
• D. The margin of the leaves
  

Answer 1

The correct option is A The nodes present in the modified stems


Nodes present in the modified stems
Nodes are the regions on the stem where the leaf or the branch joins the stem.
In potato, sugarcane, banana, ginger and Dahlia, the new plantlets arise from the adventitious buds growing at the nodes present in the modified stem.

Nodes present in the modified roots
Roots do not have nodes or internodes.

Internodes present in the modified stems
Internode is the region between the two nodes. New plants do not arise from internodes.

Margin of the leaves
Bryophyllum has buds on the margins of leaves which detach and give rise to a new plant.


Final answer:
(a) The nodes present in the modified stems