The type of primary xylem when protoxylem lies towards the pith is known as

1. endarch

2. exarch

3. endoexarch

4. Both (1) and (3)

Subtopic:  Complex Tissue: Xylem |
 86%
From NCERT
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Which one is true regarding xylem?

1. vessels are absent in gymnosperms

2. cells of vessel are called vessel members

3. tracheid and vessel lack protoplasm

4. All of these

Subtopic:  Complex Tissue: Xylem |
 88%
From NCERT
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How many elements of the xylem are dead

1. four

2. three

3. two

4. one

Subtopic:  Complex Tissue: Xylem |
 77%
From NCERT
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Sclerenchymatous fibres are

1. thick walled, elongated and pointed cells

2. contains simple and bordered pits

3. smallest  cells in plant body

4. All of these

Subtopic:  Simple Tissue: Chollenchyma & Sclerenchyma |
From NCERT
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In grasses leaves are exposed when bulliform cells becomes­­­­_________ and leaves curl inwards when they are _________

(1)flaccid ,turgid

(2)plasmolysed, turgid

(3)turgid, flaccid

(4)Both B and A

Subtopic:  Monocot Leaf |
 78%
From NCERT
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Which one is true for dicot leaf

1. veins thickness vary

2. reticulate venation is present

3. all vascular bundles are similar in size

4. Both 1 and 2

Subtopic:  Dicot Leaf |
 89%
From NCERT
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The size of the vascular bundles are dependent on the size of the

1. veins

2. air cavities

3. chloroplast

4. All of the above

Subtopic:  Dicot Leaf |
 81%
From NCERT
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Midrib and veins of the represent

(1)vascular bundle

(2) cortex          

(3)palisade parenchyma

(4)spongy parenchyma

Subtopic:  Dicot Leaf |
 82%
From NCERT
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Which of the following is true for palisade parenchyma?

1. adaxially placed

2. elongated cells

3. vertically and parallely placed

4. All of the above

Subtopic:  Dicot Leaf |
 91%
From NCERT
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The tissues present between the adaxial and abaxial epidermis are

(1)mesophyll

(2)chlorophyll

(3)vascular bundle

(4)Both A and C

Subtopic:  Dicot Leaf |
 55%
From NCERT
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