In parenchyma, all cells are isodiametric and

1. Thin-walled
2. Thick-walled
3. Lignified-walled
4. Devoid of intercellular spaces

Subtopic:  Simple Tissue: Parenchyma |
 94%
From NCERT
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In which character an isobilateral leaf differs from the dorsiventral leaf?

1. Scattered vascular bundles
2. Undifferentiated mesophylls
3. Absence of stomata with guard cells
4. Conjoint, collateral, and closed vascular bundle
Subtopic:  Monocot Leaf |
 76%
From NCERT
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Tissue which provides mechanical strength and flexibility to young dicot stem is present in

1. Pith 2. Endodermis
3. Hypodermis 4. Cortex
Subtopic:  Dicot Stem |
 81%
From NCERT
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The ground tissue system is constituted by all off these, except

1. Medullary rays 2. Pericycle
3. Mesophyll 4. Xylem
Subtopic:  Ground Tissue System |
 85%
From NCERT
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Conjoint, collateral, closed vascular bundles without phloem parenchyma are found in plants which have

1. Differentiated ground tissue in the stem
2. Dedifferentiated pericyclic structure in the mature root
3. Sclerenchymatous hypodermis in stem
4. Developed pith in stem
Subtopic:  Monocot Stem |
 81%
From NCERT
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The tissue belonging to bark but not to periderm is

1. Vascular cambium

2. Secondary phloem

3. Phellem

4. Secondary cortex

Subtopic:  Activity of Cork Cambium |
 73%
From NCERT
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Which of the following is correct with respect to lenticels?
 

a. Phellogen forms parenchymatous cells on the outer side
b. It is a lens-shaped opening
c. Helps in exchange of gases
d. Present mostly in woody trees

1. a & b correct

2. c & d correct

3. b, c, & d correct

4. All are correct 

Subtopic:  Activity of Cork Cambium |
 69%
From NCERT
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In a leaf, oval cells with large intercellular spaces and radially arranged columnar cells without intercellular spaces are placed respectively towards

1. Adaxial and abaxial epidermis
2. Abaxial and adaxial epidermis
3. Abaxial and abaxial epidermis
4. Lower and abaxial epidermis
Subtopic:  Dicot Leaf |
 67%
From NCERT
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Which of the following is not the component of secondary phloem?
1. Protophloem
2. Bast fibers
3. Companion cells
4. Phloem parenchyma

Subtopic:  Complex Tissue: Phloem |
 68%
From NCERT
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Monocot root differs from dicot root in

1. Having differentiated ground tissue
2. Presence of centripetal xylem
3. Pericyclic origin of lateral roots
4. Presence of large and well-developed pith
Subtopic:  Anatomy of Root |
 90%
From NCERT
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