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 |
 64%
From NCERT
NEET - 2014
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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 (OLD NCERT) |
 76%
From NCERT
NEET - 2013
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Lenticels are involved in

1. transpiration

2. gaseous exchange

3. food transport

4. photosynthesis

Subtopic:  Activity of Cork Cambium |
 88%
From NCERT
NEET - 2013
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Age of a tree can be estimated by?

1. its height and girth

2. biomass

3. number of annual rings

4. diameter of its heartwood

Subtopic:  Types of Wood (OLD NCERT) |
 95%
From NCERT
NEET - 2013
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The common bottle cork is a product of

(1) Dermatogens

(2) phellogen

(3) xylem

(4) vascular cambium

Subtopic:  Activity of Cork Cambium |
 76%
NEET - 2012
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Companion cells are closely associated with

(1) sieve elements

(2) vessel elements

(3) trichomes

(4) guard cells

Subtopic:  Complex Tissue: Phloem |
 94%
From NCERT
NEET - 2012
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Closed vascular bundles lack

(1) ground tissue

(2) conjunctive tissue

(3) cambium

(4) pith

Subtopic:  Vascular Tissue System |
 89%
From NCERT
NEET - 2012
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Water containing cavities in vascular bundles are found in

1. sunflower

2. maize

3. Cycas

4. Pinus

Subtopic:  Monocot Stem |
 62%
NEET - 2012
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Ground tissues includes

1. All tissues except epidermis and vascular bundles

2. Epidermis and cortex

3. All tissues internal to endodermis

4. All tissues external to endodermis

Subtopic:  Epidermal Tissue System |
 87%
From NCERT
NEET - 2011
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In land plants, the guard cells differ from other epidermal cells in having:-

1. mitochondria

2. endoplasmic reticulum

3. chloroplasts

4. cytoskeleton

Subtopic:  Epidermal Tissue System |
 79%
NEET - 2011
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