The cork cambium, cork and secondary cortex are collectively called as
Phellem
Periderm
Phellogen
Phelloderm
A
Phelloderm
B
Periderm
C
Phellem
D
Phellogen
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Solution
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In extrastelar secondary growth, epidermis and pericycle with parenchyma or collenchyma cells acquire secondary meristematic property by de-differentiation and is called as cork cambium. It is a lateral meristem which helps in secondary growth. It produces tough protective material called as cork. The phelloderm is present inside the cork cambium. The phelloderm (secondary cortex), phellogen (cork cambium) and phellem (cork) are the primary covering layer when the epidermis gets ruptured. This periderm is protective layer of the dicot stem.
Thus, the correct answer is option D.
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Similar Questions
Q1
The cork cambium, cork and secondary cortex are collectively called
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Q2
Which of the following 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
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Q3
Which of the following 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.
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Q4
Which of the following statements is or are not true? a. Cork cambium is otherwise called as phellogen. b. Cork is otherwise called as phellem. c. Secondary cortex is otherwise called as periderm. d. Cork cambium, cork and secondary cortex are collectively called as phelloderm.
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Q5
Which of the following statements are not correct?
I. Cork cambium is otherwise called phellogen.
II. Cork is otherwise called phellem.
III. Secondary cortex is otherwise called periderm.
IV. Cork cambium, cork and secondary cortex are collectively called phelloderm.
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