First slide

Secondary Growth

Question

Cork cambium gives rise to which of the following tissues?
(a) Cork and secondary cortex
(b) Vascular cambium
(c) Xylem and phloem

Easy

A

a only
B

b and c only
C

a and c only
D

a, b and c

Solution

The phellogen (or cork cambium) cuts off cells both on its outer side and inner side. The cells cut off on outer side are phellem or cork cells and cells cut off on inner side constitute phelloderm or secondary cortex.

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