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Which of the the following statement is incorrect about dicot stem?
Vascular bundles are arranged in a ring-like pattern.
Each vascular bundle has an endarch protoxylem and is conjoint and open.
The pith is made up of several spherical, parenchymatous cells with wide intercellular gaps that fill the stem's middle.
The pericycle is visible as semilunar patches of sclerenchyma on the inner side of the endodermis and above the xylem.
Answers (1)
Above the xylem and on the inner side of the endodermis, semilunar patches of sclerenchyma are indicative of the pericycle: In dicot stems, the pericycle is a layer of cells that encircles the vascular tissue. It produces lateral roots and is situated in the space between the endodermis and phloem tissue. The pericycle can be seen as semilunar patches of sclerenchyma above the xylem and on the outside of the endodermis. Hence option 4 is the correct answer.
Explanation for the incorrect options:
Vascular bundles are arranged in a ring-like manner: In dicot stems, the vascular bundles are arranged in a ring-like pattern. This ring is made up of alternating strands of xylem and phloem tissues and is situated close to the stem's exterior. Hence option 1 is incorrect.
Each vascular bundle is conjoint and open, and it has an endarch protoxylem. In dicot stems, the xylem tissue is made up of tracheids and vessels, and each vascular bundle has an endarch protoxylem. The xylem and phloem are not separated by cambium because the vascular bundles are conjoint, connected together, and open. Hence option 2 is incorrect.
The pith fills the center of the stem and is composed of many spherical, parenchymatous cells with vast intercellular gaps: The pith of a dicot stem is comprised of large, spherical parenchyma cells with vast intercellular spaces and is found at the center of the stem. Hence option 3 is incorrect.
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