Answer: A main primary root with lateral branches.
- A Many roots of equal size from stem base
- B A main primary root with lateral branches
- C Root that stores food only
- D Root found in grasses
Correct answer: B. A main primary root with lateral branches
Explanation: A tap root system has a single main primary root that grows downward with lateral branch roots. It is characteristic of dicotyledons like carrot, radish, and sunflower.
In a dicot stem, vascular bundles are arranged in a single ring (with cambium between xylem and phloem, enabling secondary growth); in a monocot stem, bundles are scattered throughout with no cambium, so monocots can't undergo secondary growth (no wood formation).
Concept context
External structure of roots, stems, and leaves plus internal tissue organization. High marks in Class 11 and NEET.