Bordered pits are elongated transversely and arranged in vertical series. The pattern is known as
A
Scalariform pitting
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B
Intervascular pitting
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C
Reticulate thickening
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D
Oblique pitting
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Solution
The correct option is A Scalariform pitting The pitted thickening is a characteristic of the vessels of meta-xylem and secondary xylem. The pits may be circular or elongate bordered type. Scalariform pitted thickening is a highly advanced type of pitting pattern where elongated bordered pits are arranged in a ladder-like (scalariform) pattern.