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Q33 (CDS-II/2018) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Plant anatomy physiology Answer Verified

Which one of the following features is an indication for modification of stem of a plant?

Result
Your answer: —  Â·  Correct: A
Explanation

The presence of 'eyes' on a potato is a definitive indication of a modified stem. In botanical terms, a potato is an underground storage stem known as a tuber [1]. These 'eyes' are actually axillary buds located at the nodes of the stem, which can give rise to new shoots and roots. While onions are also modified stems (bulbs), the 'scales' mentioned in the options are modified leaves that store food, not the stem itself. In pea plants, tendrils are typically modifications of the leaf or leaflets rather than the stem. Carrots are modified taproots, and the 'hairs' found on them are root hairs, which are epidermal extensions of the root system used for water absorption. Therefore, the 'eye' of the potato is the most accurate feature identifying a stem modification among the given choices.

Sources

  1. [1] Science ,Class VIII . NCERT(Revised ed 2025) > Chapter 13: Our Home: Earth, a Unique Life Sustaining Planet > Activity 13.3: Let us find out > p. 221
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