Periderm comprises of

(A)Phellem

(B)phellogen

(C)phelloderm

(D)All of these

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The dead cells which are formed towards the epidermis by cork cambium are called as

(A)cork

(B)phellem

(C)phelloderm

(D)Both A and B

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The chloroplast containing parenchymatous cells which are formed towards the innersideby cork cambium are called as

(A)secondary cortex

(B)phelloderm

(C)phellem

(D)Both A and B

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Which one is true for phellogen

(A)thick layer cells

(B)narrow, thin walled and nearly rectangular cells

(C)gives rise to phellem and phelloderm

(D)All of the above

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Incorrect match is

(A)Phellogen  = cork cambium

(B)Phellem = Cork

(C)Phelloderm=cortex

(D)Phelloderm=Secondary cortex

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In plants the replacement of the outer cortical and epidermal layers when they are broken are because of the

(A)Cork cambium

(B)vascular cambium

(C)Phellogen

(D)Both A and C

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The cork is impervious to ______due to __________deposition in the cell wall.

(A)water, suberin

(B)water, lignin

(C)water, wax

(D)water, cellulose

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Bark non-technically refers to tissues which lies

(A)exterior to vascular cambium

(B)exterior to cork cambium

(C)exterior to primary phloem

(D)All of the above

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How many of the followings constitute the bark?

( secondary phloem, secondary cortex, cork cambium, complimentary cells, epidermis, periderm )

(A)6

(B)5

(C)4

(D)3

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Which of the following is true for complementary cells?

(A)thin walled and colorless

(B)parenchymatous and rounded

(C)non- suberised

(D)All of the above

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