Phloem of gymnosperm consist of

1. Albuminous cells and Sieve cells

2. Sieve tubes and companion cells

3. Phloem parenchyma and phloem fibres

4. None of the above

Subtopic:  Complex Tissue: Phloem |
 88%
From NCERT
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Function of sieve tubes are controlled by

1. Nucleus of sieve tube

2. Nucleus of companion cell

3. Nucleus of parenchyma

4. No function as they are dead cells

Subtopic:  Complex Tissue: Phloem |
 94%
From NCERT
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The companion cells help in maintaining the ________ in the sieve tube.

(1) Temperature gradient

(2) Cellulose gradient

(3) Pressure gradient

(4) Ion gradient

Subtopic:  Complex Tissue: Phloem |
 92%
From NCERT
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Resin, latex and mucilage are found in

1. Phloem parenchyma

2. Xylem parenchyma

3. Phloem pits

4. None of the above

Subtopic:  Complex Tissue: Phloem |
 80%
From NCERT
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Phloem parenchyma is absent in most of the

1. Dicotyledons

2. Monocotyledons

3. Desert plants

4. None of the above

Subtopic:  Complex Tissue: Phloem |
 91%
From NCERT
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Phloem fibres are made up of

1. Parenchymatous cells

2. Sclerenchymatous cells

3. Collenchymatous cells

4. None of the above

Subtopic:  Complex Tissue: Phloem |
 82%
From NCERT
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Which component of Jute, Flax and Hemp are commonly used?

(1) Phloem fibres

(2) Xylem fibres

(3) Sieve tubes

(4) All of the above

Subtopic:  Complex Tissue: Phloem |
 87%
From NCERT
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Epidermis in plant is generally

1. Single layered

2. Double layered

3. Triple layered

4. Present in patches

Subtopic:  Epidermal Tissue System |
 92%
From NCERT
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Epidermal cells are parenchymatous with __________ amount of cytoplasm lining, the cell wall and _______ vacuole.

(1) Small, large

(2) Large, small

(3) Small, no

(4) Large, no

Subtopic:  Epidermal Tissue System |
 73%
From NCERT
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A waxy thick layer which prevent water loss is

1. Cuticle

2. Guard cell

3. Epidermis

4. Stomata

Subtopic:  Epidermal Tissue System |
 94%
From NCERT
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