Minute pores known as __________ dot the surface of the epidermis of leaves and stems; each pore is bordered by two _____________ .
1. stomata; guard cells
2. stomata; fibers
3. sieve tube elements; companion cells
4. sclereids; guard cells
Subtopic:  Epidermal Tissue System |
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Epidermal tissue system consists of 
1. Epidermal cells only
2. Epidermal cells and stomata only
3. Epidermal appendages only
4. Epidermal cells, stomata, trichomes and hairs
Subtopic:  Epidermal Tissue System |
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Stomatal apparatus is represented by: 
1. Stomatal aperture 
2. Guard cell 
3. Subsidiary cells 
4. All of the above 
Subtopic:  Epidermal Tissue System |
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Stomata in grass leaf are

1. Rectangular                               
2. Kidney shaped
3. Dumb-bell shaped                      
4. Barrel shaped
Subtopic:  Epidermal Tissue System |
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Which of the following is true for trichomes of stem? 
1. They are always unbranched, soft, or stiff 
2. They do not perform secretion 
3. They help in preventing water loss due to transpiration 
4. May show secondary growth 
Subtopic:  Epidermal Tissue System |
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The epidermal hairs of root are usually _________while of shoots are usually________

1. unicellular, multicellular
2. multicellular, unicellular
3. multicellular, multicellular
4. unicellular, unicellular
Subtopic:  Epidermal Tissue System |
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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 |
 90%
Level 1: 80%+
NEET - 2016
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One important difference between the anatomy of roots and the anatomy of leaves is that:
1. only leaves have phloem and only roots have xylem.
2. root cells have cell walls and leaf cells do not.
3. a waxy cuticle covers leaves but is absent from roots.
4. vascular tissue is found in roots but is absent from leaves.
Subtopic:  Epidermal Tissue System |
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Guard cells help in:

1. protection against grazing
2. transpiration
3. guttation
4. fighting against infection
Subtopic:  Epidermal Tissue System |
 88%
Level 1: 80%+
AIPMT - 2009
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The given diagram shows dumb-bell shaped guard cells. This type of guard cell is typically found in which of the following types of plants?
  
1. Dicotyledonous plants like China rose and sunflower
2. Gymnosperms like Cycas and Pinus
3. Monocotyledonous plants like wheat and maize
4. Bryophytes like Funaria and Riccia
Subtopic:  Epidermal Tissue System |
 87%
Level 1: 80%+
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