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Question
Two cross-sections of stem and root appear simple when viewed with the naked eye. But under the microscope, they can be differentiated by
Two cross-sections of stem and root appear simple when viewed with the naked eye. But under the microscope, they can be differentiated by
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Solution
The correct option is D endarch condition of stem and exarch condition of the root
In stems the protoxylem or the first formed xylem faces the pith at the centre. The metaxylem or the latter formed xylem faces the endodermis at the peripehery. This is called as an endarch condition and is typical of stems.
When the protoxylem faces the endodermis at the periphery and the protoxylem faces the pith at the centre, it is called as exarch and is found in roots.
In stems the protoxylem or the first formed xylem faces the pith at the centre. The metaxylem or the latter formed xylem faces the endodermis at the peripehery. This is called as an endarch condition and is typical of stems.
When the protoxylem faces the endodermis at the periphery and the protoxylem faces the pith at the centre, it is called as exarch and is found in roots.
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