Question

Which of the following statements is/are not true?
A. Cork cambium is otherwise called phellogen
B. Cork is otherwise called phellem
C. Secondary cortex is otherwise called
periderm
D. Cork cambium, cork and secondary cortex are
collectively called phelloderm
(a) C and D (b) A and B
(c) B and C (d) B and D
(e) A and D

Answer 1

Answer:

a and d

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Answer 2

Incorrect statement:

• Option “A” is correct i.e. C and D.

• The incorrect statements are “secondary cortex is otherwise called periderm and cork cambium, cork and secondary cortex are collectively called phelloderm”.

• Throughout secondary growth in dicot roots, phellogen or cork cambium yields periderm. The cork cambium yields cork or phellem towards the margin. The secondary cortex (secondary phloem) is formed by the cambium and while periderm is settled by phellogen. Thus, the cork cambium yields phelloderm on inside and phellem or cork on the outside.

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