First slide
The Stem
Question

Choose the pairs that have same type of stem modifications
I. Potato, Sweet potato  
II. Colocasia, Zaminkand 
III. Opuntia, Euphorbia  
IV. Banana, Mint

Easy
Solution

Colocasia and Zaminkand have corm which is an underground modified stem. Opuntia and Euphorbia have phylloclade which is an aerial stem modification. Potato has stem tuber and Sweet potato has tuberous adventitious root. Banana has suckers and rhizome but Mint plant has stolon.

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