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Q. No.Which one is correct for autumn wood
(1)It is formed due less activity of cambium
(2)It produces fewer xylary elements having narrow vessels
(3)It is also called as late wood
(4)All of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe early wood is ___________ in color and late wood is ____________ in color.
(1)lighter, darker
(2)darker, lighter
(3)lighter, lighter
(4)darker, darker
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe early wood has ___________ density and late wood has ____________ density.
(1)lower, higher
(2)higher, lower
(3)lower, lower
(4)higher, higher
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one is true for annual ring
(1) A ring of autumn wood and a ring of spring wood constitute annual ring
(2) It appears as alternate concentric ring
(3)It gives an estimate of the age of the tree.
(4)All of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyHeartwood is
(1)dark brown in color
(2)contains organic compounds like tannin, resins, gums, oils
(3)known as duramen
(4)All of these
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyHow many of the statements are true for heartwood
a. It provides mechanical support to the stem
b. It does not conduct water
c. It is hard, durable and resistant to the attacks of microbes
d. It is the innermost layer of the wood
e. It comprises dead elements with highly lignified walls
f. More the heartwood is present the better is the quality of the wood
(1)4
(2)5
(3)6
(4)3
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one is true for sapwood
(1)It lies in the peripheral region of xylem
(2)It does conduction of water and minerals
(3)It is also called as alburnum
(4)All of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCork cambium gives rise
(1)cork
(2)phelloderm
(3)phellem
(4)All of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPeriderm comprises of
(1)Phellem
(2)phellogen
(3)phelloderm
(4)All of these
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe dead cells which are formed towards the epidermis by cork cambium are called as
(1)cork
(2)phellem
(3)phelloderm
(4)Both A and B
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect Question Set:
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