The term 'bark' refers to:
 

1. phellem, phelloderm and vascular cambium
2. periderm and secondary xylem
3. cork cambium and cork
4. phellogen, phellem, phelloderm and secondary phloem

Subtopic:  Activity of Cork Cambium |
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In the sieve elements, which one of the following is the most likely function of P-proteins?

1. Depletion of callose on sieve plates

2. Providing energy for active translocation

3. Autolytic enzymes

4. Sealing off mechanism on wounding

Subtopic:  Complex Tissue: Phloem |
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Which of the following is an epidermal cell containing chloroplast?

1. Stomata

2. Hydathode

3. Guard cell

4. None of these

Subtopic:  Epidermal Tissue System |
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The structures present in the roots to absorb water and minerals is:

1. Epidermal extensions

2. Hypodermis

3. Endodermis

4. Epidermal appendages

Subtopic:  Epidermal Tissue System |
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The interxylary phloem is found in the stem of:  

1. Cucurbita

2. Salvia

3. Calotropis

4. None of these

Subtopic:  Complex Tissue: Phloem |
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Wound healing is due to:

1. Ventral meristem

2. secondary meristem

3. Primary meristem

4. All of these

Subtopic:  Meristematic Tissue:Classification (OLD NCERT) |
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Angular collenchyma occurs in:

1. Salvia

2. Helianthus

3. Althaea

4. Cucurbita

Subtopic:  Simple Tissue: Chollenchyma & Sclerenchyma |
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In pteridophytes, phloem is without:

1. bast fibers

2. sieve tubes

3. companion cells

4. sieve cells

Subtopic:  Complex Tissue: Phloem |
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Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following :

1. Tyloses in vessels

2. Closure of stomata 

3. Flaccidity of bulliform cells

4. Shrinkage of air spaces in spongy mesophyll

Subtopic:  Monocot Leaf |
 81%
From NCERT
NEET - 2019
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Phloem in gymnosperms lacks:

1. Both sieve tubes and companion cells 

2. Albuminous cells and sieve cells

3. Sieve tubes only

4. Companion cells only

Subtopic:  Complex Tissue: Phloem |
 82%
From NCERT
NEET - 2019
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