Which one is true for sapwood

(A)It lies in the peripheral region of xylem

(B)It does conduction of water and minerals

(C)It is also called as alburnum

(D)All of the above

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Least distinct annual rings are present in regions like

(A)tropical areas

(B)desert

(C)coastal areas

(D)All of the above

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Secondary growth in extra stelar region is due to

(A)Phellogen

(B)Cork cambium

(C)Extrastelar cambium

(D)All of these

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Cork cambium is derived from the

(A)hypodermis

(B)outer layer of the cortex

(C)endodermis

(D)Both A and B

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Cork cambium gives rise

(A)cork

(B)phelloderm

(C)phellem

(D)All of the above

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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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