Secondary growth generally occurs in- A. Monocots B. Dicots C. Gymnosperms D. Both B and C
Option D. Secondary growth (increase in diameter or girth) generally occurs in dicots and Gymnosperms as in both the groups the vascular bundles in the stem are conjoint, colateral and open (for secondary growth due to presence of lateral cambium or vascular cambium in between the xylem and phloem). Examples of dicots- Mangifera, Ficus etc Examples of gymnosperms -Cycas, Pinus etc So, the correct answer is 'Both (b) and (c)'
