Which of the following is made up of dead cells?

(1) Xylem parenchyma

(2) Collenchyma

(3) Phellem

(4) Phloem

Subtopic:  Activity of Cork Cambium |
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The vascular cambium normal gives rise to.

(1) phelloderm                                         

(2) primary phloem

(3) secondary xylem                                 

(4) periderm

Subtopic:  Activity of Vascular Cambium |
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Cortex is the region found between

(1) Epidermis and stele

(2) Pericycle and endodermis

(3) Endodermis and pith

(4) Endodermis and vascular bundle

Subtopic:  Anatomy of Root |
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The balloon-shaped structures called tyloses

(1) Original in the lumen of vessels

(2) characterise the sapwood

(3) are exetentions of xylem parenchyma cells into vessels

(4) are linked to the ascent of sap through xylem vessels

Subtopic:  Complex Tissue: Xylem |
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Specialised epidermal cells surrounding the guard cells are called ?

1. subsidiary cells

2. bulliform cells

3. lenticels

4. complementary cells

Subtopic:  Epidermal Tissue System |
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Vascular bundles in monocotyledons are considered closed because

1. a bundle sheath surrounds each bundle

2. cambium is absent

3. there are no vessels with performations

4. xylem is surrounded all around by phloem

 

Subtopic:  Vascular Tissue System |
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A major characteristic of the monocot root is the presence of

1. open vascuiar bundles

2. scattered vascular bundles

3. vasculature without cambium

4. cambium sandwiched between phloem and xylem along the radius

Subtopic:  Anatomy of Root |
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You are given a fairly old piece of dicot stem and a dicot root. Which of the following

anatomical structures will you use to distinguish between the two?

1. Secondary xylem

2. Secondary phloem

3. Protoxylem

4. Cortical cells

Subtopic:  Complex Tissue: Xylem |
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Interfascicular cambium develops from the cells of ?

1. medullary rays

2. xylem parenchyma

3. endodermis

4. pericycle

Subtopic:  Activity of Vascular Cambium |
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Lenticels are involved in

1. transpiration

2. gaseous exchange

3. food transport

4. photosynthesis

Subtopic:  Activity of Cork Cambium |
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