Which of the following is known as living mechanical tissue

(A)parenchyma

(B)collenchyma

(C)sclerenchyma

(D)All of the above

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Which one is true of collenchyma?

(A)forms the hypodermis of dicot stem

(B) present below epidermis in layers or patches

(C)thickened corners due to cellulose, hemicellulose, and pectin deposition

(D)All of the above

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The main mechanical tissue of the plant is

(A)sclerenchyma

(B)collenchyma

(C)parenchyma

(D)Both B and C

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Sclerenchyma is

(A) dead and lignified

(B)consists of long, narrow, thick walled cells

(C)may be in the form of fibres and sclereids

(D)All of these

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Which one is true for sclereids

(A)highly thickened dead walls with narrow lumen

(B)present in fruit walls of nuts

(C)pulp of guava, pear, and sapots

(D)All of the above

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Screlenchymatous fibres are

(A) thick walled, elongated and pointed cells

(B)contains simple and bordered pits

(C)smallest  cells in plant body

(D)All of these

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Complex tissues are

(A)heterogenous

(B)absent in gametophytes

(C)known as vascular tissues

(D)All of these

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How many elements of the xylem are dead

(A)4

(B)3

(C)2

(D)1

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Which one is true regarding xylem?

(A)vessels are absent in gymnosperms

(B)cells of vessel are called vessel members

(C)tracheid and vessel lack protoplasm

(D)All of these

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The elements of xylem which does food storage is

(A)tracheids

(B)vessels

(C)xylem parenchyma

(D) xylem fibres

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