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| Q. |
Which of these is a modified underground stem? |
| A. | Radish |
| B. | Carrot |
| C. | Sweet Potato |
| D. | Potato |
| Answer» D. Potato | |
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Explanation: Underground stems are modified plant structures that derive from stem tissue but exist under the soil surface. Seedlings develop two structures or axes of growth, one that develops upward out of the soil, called stems, and structures that develop downward which arecalled roots. Potato is such a modified underground stern. |
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