The periderm includes

Secondary xylem and phloem in dicot stem are produced by

Which of the statements given below is not true about formation of Annual Rings in trees ?

Bulliform cells are the modification of

Assertion: Cambium is a lateral meristem and cause growth in width.
Reason: Cambium is made up of fusiform and ray initials in stem.

Vascular cambium of dicot root is purely secondary in origin and arise from