The shape of the vascular bundle is __________in the beginning and later it becomes ___________in dicot root.

(1)wavy, circular

(2)circular, wavy

(3)circular , rectangular

(4)wavy, and trapezoid

Subtopic:  Secondary Growth in Root |
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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.

(1)periphery, centre

(2)centre, periphery

(3)innerside, outerside

(4)Both B and C

Subtopic:  Activity of Vascular Cambium |
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There are _________types of medullary rays formed in dicot roots during secondary growth.

(1)one

(2)two

(3)three

(4)many

Subtopic:  Ground Tissue System | Activity of Cork Cambium |
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The common medullary rays between dicot stem and root is

(1)primary medullary rays

(2)secondary medullary rays

(3)Both A and B

(4)None of the above

Subtopic:  Activity of Cork Cambium |
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Secondary growth occurs in

(1)dicot root and stem of angiosperms

(2)dicot root and stem of gymnosperms

(3)monocot roots

(4)Both 1 and 2

Subtopic:  Secondary Growth in Root |
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Lenticels are present in

(1)stem only

(2)root only

(3)Both A and B

(4)root, stem and leaf

Subtopic:  Activity of Cork Cambium |
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The more correct function of the medullary rays in dicot roots are

(1) water conduction only

(2)food conduction only

(3)food and water conduction

(4) food and water conduction in radial direction

Subtopic:  Activity of Vascular Cambium |
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Which of the following is known as living mechanical tissue

(1)parenchyma

(2)collenchyma

(3)sclerenchyma

(4)All of the above

Subtopic:  Simple Tissue: Chollenchyma & Sclerenchyma |
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Which one is true of collenchyma?

(1)forms the hypodermis of dicot stem

(2) present below epidermis in layers or patches

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

(4)All of the above

Subtopic:  Simple Tissue: Chollenchyma & Sclerenchyma |
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The main mechanical tissue of the plant is

(1)sclerenchyma

(2)collenchyma

(3)parenchyma

(4)Both B and C

Subtopic:  Simple Tissue: Chollenchyma & Sclerenchyma |
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