From the plants given below, select the monocots having secondary growth in their stem
Yucca
Wheat
Aloe
Both ($a$) and ($c$)
The balloonshaped structures called tyloses
Histogen theory was proposed by
Starch is mainly manufacture by
Vascular bundles in the stem of Cucurbita or Lagenaria are
Vascular bundles are conjoint, collateral, endarch and lack cambium between xylem and phloem in all, but not in