Question : Which of the following is not a stem modification?
Option 1: Bulb of onion
Option 2: Corm of Arvi
Option 3: Tuber of sweet potato
Option 4: Tuber of potato
Correct Answer: Tuber of sweet potato
Solution : The correct option is Tuber of sweet potato.
An example of a tuberous root that is not a modified stem is the sweet potato. Both above and below ground, modified stems are common. Crowns, stolons, runners and spurs are found above ground, while bulbs, corms, rhizomes, tubers and tendrils are found below.
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