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NEET Practice Questions (MCQs) with Answers & Solutions

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All Physics Chemistry Botany Zoology

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Interfascicular cambium is formed from

medullary rays

intrafascicular cambium

cork cambium

pericycle

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Explanation

Refer NCERT,heading 6.4 para 1, page 95

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The cells which are formed from vascular cambium towards the centre are____________and towards the periphery are _________________

secondary xylem, secondary phloem

bast, wood

wood, bast

Both A and C

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Explanation

Refer NCERT,heading 6.4.1.2 para 1, page 95

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The secondary xylem is produced more because

cambium is more active towards the inner side

cambium is more active towards the outer side

xylem is more important than phloem

All of the above

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Explanation

Refer NCERT,heading 6.4.1.2 para 1, page 95

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The primary and secondary phloems get gradually crushed because of

continuous formation and accumulation of secondary xylem

discontinuous formation and accumulation of secondary xylem

by pressure of secondary xylem as they are continuously formed

Both A and C

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Explanation

Refer NCERT

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Primary xylem remains less or more intact towards the __________

around the centre

around the periphery

outer to the pith

Both A and C

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Explanation

Refer NCERT,heading 6.4.1.2 para 1, page 95

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Secondary medullary rays are formed from

rays initials of vascular cambium

fusiform initials of vascular cambium

Both A and B

neither fusiform initials nor ray initials

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Explanation

Refer NCERT,heading 6.4.1.2 para 1, page 95 and fusiform initials form secondary medullary rays

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Which one is correct for spring wood

It is formed due more activity of cambium

It produces more xylary elements having vessels with wider cavities

It is also called as early wood

All of the above

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Explanation

Refer NCERT,heading 6.4.1.3 para 1, page 96

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Which one is correct for autumn wood

It is formed due less activity of cambium

It produces fewer xylary elements having narrow vessels

It is also called as late wood

All of the above

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Explanation

Refer NCERT,heading 6.4.1.3 para 1, page 96

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The early wood is ___________ in color and late wood is ____________ in color.

lighter, darker

darker, lighter

lighter, lighter

darker, darker

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Explanation

Refer NCERT,heading 6.4.1.3 para 1, page 96

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Which one is true for annual ring

A ring of autumn wood and a ring of spring wood constitute annual ring

It appears as alternate concentric ring

It gives an estimate of the age of the tree.

All of the above

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Explanation

Refer NCERT,heading 6.4.1.3 para 1, page 96

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