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B
add to the diameter of existing roots and shoots
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C
are found only in the embryo
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D
are found only in the seedling
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Solution
The correct option is A add to the length of roots and shoots A. Add to the length of roots and shoots
Reason: Primary meristems are those meristematic tissues which are derived directly from the meristems of the embryo. Primary tissues of a plant arise from apical meristem. Such tissues include epidermis, primary vascular tissues as xylem and phloem and the ground tissues. It is involved increasing the length of stem and root.