Which of the following is not a stern modification? (1) Bulb of Onion (2) Corm of Arvi (3) Tuber of Sweet-potato (4) Tuber of Potato

Which of the following is not a stern modification? (1) Bulb of Onion (2) Corm of Arvi (3) Tuber of Sweet-potato (4) Tuber of Potato
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(3) Tuber of Sweet-potato Explanation: A modified stem is a part of a plant with special features developed for special functions. Modified stems can be found either above or below ground. Examples of above the ground modified stems include; crowns, stolons, runners or spurs, while below the ground include; bulbs, corms, rhizomes, tubers and tendrils. Sweet potato is an example of a tuberous root.
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