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NEET Practice Questions (MCQs) with Answers & Solutions

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All Physics Chemistry Botany Zoology

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In dicot root vascular cambium is _________in origin.

Primary

Secondary

Both A and B

neither primary nor secondary

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Explanation

Refer NCERT,heading 6.4.3 para 1, page 97

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In dicot roots, secondary phloem is formed towards the _________ and secondary xylem is formed towards the __________ by the activity of vascular cambium.

periphery, centre

centre, periphery

innerside, outerside

Both B and C

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Explanation

Refer NCERT,heading 6.4.3 para 1, page 98, figure 6.11

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There are _________types of medullary rays formed in dicot roots during secondary growth.

one

two

three

many

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Explanation

primary medullary rays & secondary medullary rays are two types of medullary rays

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The common medullary rays between dicot stem and root is

primary medullary rays

secondary medullary rays

Both A and B

None of the above

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Explanation

Secondary medullary rays are common in both

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Lenticels are present in

stem only

root only

Both A and B

root, stem and leaf

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Explanation

It is also present in roots in less number.

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The more correct function of the medullary rays in dicot roots are

water conduction only

food conduction only

food and water conduction

food and water conduction in radial direction

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Explanation

It conducts food and water conduction in radial direction

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Which one is correct for permanent tissue

can be homogenous tissue or heterogenous tissue

always dead

may be living or dead

Both A and C

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Explanation

Refer NCERT, heading 6.1.2 para 1, page 86

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Which one is true of parenchyma

help in storage, secretion and photosynthesis

intercellular spaces are schizogenous in origin

universal tisssue

All of the above

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Explanation

Refer NCERT, heading 6.1.2 para 1, page 86schizogenous (due to separation of cells)

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Which of the following is known as living mechanical tissue

parenchyma

collenchyma

sclerenchyma

All of the above

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Explanation

Refer NCERT,heading 6.1.2.1 para 1, page 86

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Which one is true of collenchyma?

forms the hypodermis of dicot stem

present below epidermis in layers or patches

thickened corners due to cellulose, hemicellulose, and pectin deposition

All of the above

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Explanation

Refer NCERT, heading 6.1.2.1 para 1, page 86

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