1. Tardigrade
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  3. Biology
  4. Two cross-sections of stem and root appear simple, when viewed by naked eye. But under microscope, they can be differentiated by

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Q. Two cross-sections of stem and root appear simple, when viewed by naked eye. But under microscope, they can be differentiated by

NTA AbhyasNTA Abhyas 2022

Solution:

Characteristic feature of stem is endarch condition of xylem tissue. In endarch, protoxylem is present towards the centre of stem, while metaxylem towards the pericycle. Characteristic feature of root is exarch condition of xylem tissue. In exarch condition, protoxylem is present towards the pericycle and metaxylem towards the center of the root.