Question

Which of the following are first found with the beginning of secondary growth in a dicot root?

• A. Cells of the pericycle thickens
• B. Cambial initials between xylem and phloem
• C. Anticlinal division occurs in cambium to make its ring
• D. Cells of conjunctive parenchyma become meristematic

Answer 1

The correct option is D Cells of conjunctive parenchyma become meristematic

Secondary growth occurs in many dicot roots causes thickening of the root diameter by the addition of vascular tissue. Initially, it occurs when cells in the residual procambium and parts of the pericycle begin to make periclinal divisions. Only the pericycle cells opposite the xylem points start to make periclinal divisions. The inner layer of cells becomes the vascular cambium. The outer layer is retained as pericycle. The vascular cambium is continuous around the primary xylem and phoem
Thus, the correct answer is option 'D'