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In which plant organ is the xylem typically exarch, with protoxylem lying towards the periphery?
AStem
BRoot
CFlower
DFruit
Answer & Solution
Correct answer: B. Root
1. In the exarch condition, protoxylem lies towards the periphery and metaxylem towards the centre.
2. The text gives roots as the example of the exarch arrangement.
3. So the answer is root.
4. Stems are endarch, with protoxylem towards the centre, so the stem is the trap.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 12 Plant Anatomy and Plant Physiology "Exarch", p.181_
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