You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will your use to distinguish between the two?

1. Secondary xylem

2. Secondary phloem

3. Protoxylem

4. Cortical cells

Subtopic:  Dicot Stem |
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Tracheids differ from the tracheary elements in :

1. Having casparian strips

2. Being imperforate

3. Lacking nucleus

4. Being lignified

Subtopic:  Complex Tissue: Xylem |
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Age of a tree can be estimated by :

1. biomass

2. number of annual rings

3. diameter of its heartwood

4. its height and girth

Subtopic:  Types of Wood |
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Lenticels are involved in:
1. Gaseous exchange
2. Food transfer
3. Photosynthesis
4. Transpiration

Subtopic:  Activity of Cork Cambium |
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Interfascicular cambium develops from the cells of

1. Xylem parenchyma

2. Endodermis

3. Pericycle

4. Medullary rays

Subtopic:  Activity of Vascular Cambium |
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The common bottle cork is a product of

1. dermatogen

2. phellogen

3. xylem

4. vascular cambium

Subtopic:  Activity of Cork Cambium |
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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 |
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Closed vascular bundles lack

1. Ground tissue

2. Conjuctive tissue

3. Cambium

4. Pith

Subtopic:  Vascular Tissue System |
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Water containing cavities in vascular bundles are found in

1. Sunflower

2. Maize

3. Cycas

4. Pinus

Subtopic:  Monocot Stem |
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Gymnosperms are also called soft wood spermatophytes because they lack

1. Cambium

2. Phloem fibres

3. Thick-walled tracheids

4. Xylem fibres

 

Subtopic:  Complex Tissue: Xylem |
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