FORESTRY
PLANT AND WOOD ANATOMY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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secondary xylem
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secondary phloem
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protoxylem
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cortical cells
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Detailed explanation-1: -Final answer: If we are given a fairly old piece of dicot stem and a dicot root, protoxylem will be the anatomical structure to distinguish between the two.
Detailed explanation-2: -Dicot root In dicot roots, the vascular structures are located in the middle of the root. The arrangement of xylem and phloem is different in dicots than it is in monocots. The xylem is all located in the middle of the dicot root, and bundles of phloem are arranged around it, separated from it by vascular cambium.
Detailed explanation-3: -In dicot stem, pericycle is multilayered and it is composed of sclerenchyma or parenchyma or both. In dicot root, pericycle is single layered. It is composed of thin-walled parenchymatous cells. The first formed xylem is called protoxylem and it is position can be different is some dicot stem and dicot root.
Detailed explanation-4: -The tissue that is absent in cortex of dicot stem is sclerenchyma.